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Finding the Fourth Proportional to 56,020.76, 77,308.28 and 30,870.28

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Solution

The fourth proportional to 56,020.76, 77,308.28 and 30,870.28 is: 42,600.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,020.76 : 77,308.28 = 30,870.28 : x
  2. Step 2: Convert to fraction form
    56,020.76/77,308.28 = 30,870.28/x
  3. Step 3: Cross multiply
    56,020.76x = 77,308.28 × 30,870.28
  4. Step 4: Simplify right side
    56,020.76x = 2,386,528,249.92
  5. Step 5: Solve for x
    x = 2,386,528,249.92/56,020.76
  6. Step 6: Final answer
    x = 42,600.78

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