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Finding the Fourth Proportional to 265,131.55, 397,759.61 and 87,638.56

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Solution

The fourth proportional to 265,131.55, 397,759.61 and 87,638.56 is: 131,478.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,131.55 : 397,759.61 = 87,638.56 : x
  2. Step 2: Convert to fraction form
    265,131.55/397,759.61 = 87,638.56/x
  3. Step 3: Cross multiply
    265,131.55x = 397,759.61 × 87,638.56
  4. Step 4: Simplify right side
    265,131.55x = 34,859,078,671.26
  5. Step 5: Solve for x
    x = 34,859,078,671.26/265,131.55
  6. Step 6: Final answer
    x = 131,478.43

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