Finding the Fourth Proportional to 9,521.20, 14,281.82 and 5,140.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,521.20 : 14,281.82 = 5,140.72 : x
2. Step 2: Convert to fraction form
   9,521.20/14,281.82 = 5,140.72/x
3. Step 3: Cross multiply
   9,521.20x = 14,281.82 × 5,140.72
4. Step 4: Simplify right side
   9,521.20x = 73,418,837.71
5. Step 5: Solve for x
   x = 73,418,837.71/9,521.20
6. Step 6: Final answer
   x = 7,711.09