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Finding the Fourth Proportional to 4,978.91, 6,869.78 and 2,881.82

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Solution

The fourth proportional to 4,978.91, 6,869.78 and 2,881.82 is: 3,976.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,978.91 : 6,869.78 = 2,881.82 : x
  2. Step 2: Convert to fraction form
    4,978.91/6,869.78 = 2,881.82/x
  3. Step 3: Cross multiply
    4,978.91x = 6,869.78 × 2,881.82
  4. Step 4: Simplify right side
    4,978.91x = 19,797,435.05
  5. Step 5: Solve for x
    x = 19,797,435.05/4,978.91
  6. Step 6: Final answer
    x = 3,976.26

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