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Finding the Fourth Proportional to 98,780.66, 136,315.91 and 56,339.90

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Solution

The fourth proportional to 98,780.66, 136,315.91 and 56,339.90 is: 77,748.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,780.66 : 136,315.91 = 56,339.90 : x
  2. Step 2: Convert to fraction form
    98,780.66/136,315.91 = 56,339.90/x
  3. Step 3: Cross multiply
    98,780.66x = 136,315.91 × 56,339.90
  4. Step 4: Simplify right side
    98,780.66x = 7,680,024,737.81
  5. Step 5: Solve for x
    x = 7,680,024,737.81/98,780.66
  6. Step 6: Final answer
    x = 77,748.26

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