Finding the Fourth Proportional to 22,557.72, 31,126.62 and 13,119

Step by Step Solution

1. Step 1: Write the proportion equation
   22,557.72 : 31,126.62 = 13,119 : x
2. Step 2: Convert to fraction form
   22,557.72/31,126.62 = 13,119/x
3. Step 3: Cross multiply
   22,557.72x = 31,126.62 × 13,119
4. Step 4: Simplify right side
   22,557.72x = 408,350,127.78
5. Step 5: Solve for x
   x = 408,350,127.78/22,557.72
6. Step 6: Final answer
   x = 18,102.46