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Finding the Fourth Proportional to 78,782.18, 108,719.74 and 42,972.96

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Solution

The fourth proportional to 78,782.18, 108,719.74 and 42,972.96 is: 59,302.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,782.18 : 108,719.74 = 42,972.96 : x
  2. Step 2: Convert to fraction form
    78,782.18/108,719.74 = 42,972.96/x
  3. Step 3: Cross multiply
    78,782.18x = 108,719.74 × 42,972.96
  4. Step 4: Simplify right side
    78,782.18x = 4,672,009,038.23
  5. Step 5: Solve for x
    x = 4,672,009,038.23/78,782.18
  6. Step 6: Final answer
    x = 59,302.87

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