Finding the Fourth Proportional to 9,139.80, 12,613.15 and 5,604.96

Step by Step Solution

1. Step 1: Write the proportion equation
   9,139.80 : 12,613.15 = 5,604.96 : x
2. Step 2: Convert to fraction form
   9,139.80/12,613.15 = 5,604.96/x
3. Step 3: Cross multiply
   9,139.80x = 12,613.15 × 5,604.96
4. Step 4: Simplify right side
   9,139.80x = 70,696,124.15
5. Step 5: Solve for x
   x = 70,696,124.15/9,139.80
6. Step 6: Final answer
   x = 7,734.98