Finding the Fourth Proportional to 9,140.52, 12,613.20 and 5,161.98

Step by Step Solution

1. Step 1: Write the proportion equation
   9,140.52 : 12,613.20 = 5,161.98 : x
2. Step 2: Convert to fraction form
   9,140.52/12,613.20 = 5,161.98/x
3. Step 3: Cross multiply
   9,140.52x = 12,613.20 × 5,161.98
4. Step 4: Simplify right side
   9,140.52x = 65,109,086.14
5. Step 5: Solve for x
   x = 65,109,086.14/9,140.52
6. Step 6: Final answer
   x = 7,123.13