Finding the Fourth Proportional to 9,689.72, 14,521.62 and 5,531

Step by Step Solution

1. Step 1: Write the proportion equation
   9,689.72 : 14,521.62 = 5,531 : x
2. Step 2: Convert to fraction form
   9,689.72/14,521.62 = 5,531/x
3. Step 3: Cross multiply
   9,689.72x = 14,521.62 × 5,531
4. Step 4: Simplify right side
   9,689.72x = 80,319,080.22
5. Step 5: Solve for x
   x = 80,319,080.22/9,689.72
6. Step 6: Final answer
   x = 8,289.10