Finding the Fourth Proportional to 9,198.72, 12,696.96 and 5,615.04

Step by Step Solution

1. Step 1: Write the proportion equation
   9,198.72 : 12,696.96 = 5,615.04 : x
2. Step 2: Convert to fraction form
   9,198.72/12,696.96 = 5,615.04/x
3. Step 3: Cross multiply
   9,198.72x = 12,696.96 × 5,615.04
4. Step 4: Simplify right side
   9,198.72x = 71,293,938.28
5. Step 5: Solve for x
   x = 71,293,938.28/9,198.72
6. Step 6: Final answer
   x = 7,750.42