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Finding the Fourth Proportional to 28,539.84, 42,805.44 and 7,764.96

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Solution

The fourth proportional to 28,539.84, 42,805.44 and 7,764.96 is: 11,646.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,539.84 : 42,805.44 = 7,764.96 : x
  2. Step 2: Convert to fraction form
    28,539.84/42,805.44 = 7,764.96/x
  3. Step 3: Cross multiply
    28,539.84x = 42,805.44 × 7,764.96
  4. Step 4: Simplify right side
    28,539.84x = 332,382,529.38
  5. Step 5: Solve for x
    x = 332,382,529.38/28,539.84
  6. Step 6: Final answer
    x = 11,646.26

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