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Finding the Fourth Proportional to 7,920.16, 11,868.90 and 4,450.12

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Solution

The fourth proportional to 7,920.16, 11,868.90 and 4,450.12 is: 6,668.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,920.16 : 11,868.90 = 4,450.12 : x
  2. Step 2: Convert to fraction form
    7,920.16/11,868.90 = 4,450.12/x
  3. Step 3: Cross multiply
    7,920.16x = 11,868.90 × 4,450.12
  4. Step 4: Simplify right side
    7,920.16x = 52,818,029.27
  5. Step 5: Solve for x
    x = 52,818,029.27/7,920.16
  6. Step 6: Final answer
    x = 6,668.81

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