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Finding the Fourth Proportional to 306,978,812.60, 460,418,765.31 and 85,655,877.89

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Solution

The fourth proportional to 306,978,812.60, 460,418,765.31 and 85,655,877.89 is: 128,470,017.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,978,812.60 : 460,418,765.31 = 85,655,877.89 : x
  2. Step 2: Convert to fraction form
    306,978,812.60/460,418,765.31 = 85,655,877.89/x
  3. Step 3: Cross multiply
    306,978,812.60x = 460,418,765.31 × 85,655,877.89
  4. Step 4: Simplify right side
    306,978,812.60x = 39,437,573,537,355,840
  5. Step 5: Solve for x
    x = 39,437,573,537,355,840/306,978,812.60
  6. Step 6: Final answer
    x = 128,470,017.86

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