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Finding the Fourth Proportional to 257,922.60, 386,883.90 and 80,428.20

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Solution

The fourth proportional to 257,922.60, 386,883.90 and 80,428.20 is: 120,642.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,922.60 : 386,883.90 = 80,428.20 : x
  2. Step 2: Convert to fraction form
    257,922.60/386,883.90 = 80,428.20/x
  3. Step 3: Cross multiply
    257,922.60x = 386,883.90 × 80,428.20
  4. Step 4: Simplify right side
    257,922.60x = 31,116,375,685.98
  5. Step 5: Solve for x
    x = 31,116,375,685.98/257,922.60
  6. Step 6: Final answer
    x = 120,642.30

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