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Finding the Fourth Proportional to 239,229.35, 358,880.32 and 81,420.90

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Solution

The fourth proportional to 239,229.35, 358,880.32 and 81,420.90 is: 122,143.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,229.35 : 358,880.32 = 81,420.90 : x
  2. Step 2: Convert to fraction form
    239,229.35/358,880.32 = 81,420.90/x
  3. Step 3: Cross multiply
    239,229.35x = 358,880.32 × 81,420.90
  4. Step 4: Simplify right side
    239,229.35x = 29,220,357,402.66
  5. Step 5: Solve for x
    x = 29,220,357,402.66/239,229.35
  6. Step 6: Final answer
    x = 122,143.70

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