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Finding the Fourth Proportional to 7,868.44, 11,802.70 and 3,188.54

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Solution

The fourth proportional to 7,868.44, 11,802.70 and 3,188.54 is: 4,782.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,868.44 : 11,802.70 = 3,188.54 : x
  2. Step 2: Convert to fraction form
    7,868.44/11,802.70 = 3,188.54/x
  3. Step 3: Cross multiply
    7,868.44x = 11,802.70 × 3,188.54
  4. Step 4: Simplify right side
    7,868.44x = 37,633,381.06
  5. Step 5: Solve for x
    x = 37,633,381.06/7,868.44
  6. Step 6: Final answer
    x = 4,782.83

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