Finding the Fourth Proportional to 15,061.47, 22,561.53 and 7,139.98

Step by Step Solution

1. Step 1: Write the proportion equation
   15,061.47 : 22,561.53 = 7,139.98 : x
2. Step 2: Convert to fraction form
   15,061.47/22,561.53 = 7,139.98/x
3. Step 3: Cross multiply
   15,061.47x = 22,561.53 × 7,139.98
4. Step 4: Simplify right side
   15,061.47x = 161,088,816.57
5. Step 5: Solve for x
   x = 161,088,816.57/15,061.47
6. Step 6: Final answer
   x = 10,695.42