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Finding the Fourth Proportional to 258,424.68, 387,638.64 and 80,918.04

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Solution

The fourth proportional to 258,424.68, 387,638.64 and 80,918.04 is: 121,377.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,424.68 : 387,638.64 = 80,918.04 : x
  2. Step 2: Convert to fraction form
    258,424.68/387,638.64 = 80,918.04/x
  3. Step 3: Cross multiply
    258,424.68x = 387,638.64 × 80,918.04
  4. Step 4: Simplify right side
    258,424.68x = 31,366,958,977.07
  5. Step 5: Solve for x
    x = 31,366,958,977.07/258,424.68
  6. Step 6: Final answer
    x = 121,377.57

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