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Finding the Fourth Proportional to 258,585.30, 387,046.89 and 138,342.24

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Solution

The fourth proportional to 258,585.30, 387,046.89 and 138,342.24 is: 207,068.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,585.30 : 387,046.89 = 138,342.24 : x
  2. Step 2: Convert to fraction form
    258,585.30/387,046.89 = 138,342.24/x
  3. Step 3: Cross multiply
    258,585.30x = 387,046.89 × 138,342.24
  4. Step 4: Simplify right side
    258,585.30x = 53,544,933,747.63
  5. Step 5: Solve for x
    x = 53,544,933,747.63/258,585.30
  6. Step 6: Final answer
    x = 207,068.75

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