Finding the Fourth Proportional to 9,688.72, 14,520.12 and 5,530

Step by Step Solution

1. Step 1: Write the proportion equation
   9,688.72 : 14,520.12 = 5,530 : x
2. Step 2: Convert to fraction form
   9,688.72/14,520.12 = 5,530/x
3. Step 3: Cross multiply
   9,688.72x = 14,520.12 × 5,530
4. Step 4: Simplify right side
   9,688.72x = 80,296,263.60
5. Step 5: Solve for x
   x = 80,296,263.60/9,688.72
6. Step 6: Final answer
   x = 8,287.60