Finding the Fourth Proportional to 22,573.76, 31,153.68 and 13,142.96

Step by Step Solution

1. Step 1: Write the proportion equation
   22,573.76 : 31,153.68 = 13,142.96 : x
2. Step 2: Convert to fraction form
   22,573.76/31,153.68 = 13,142.96/x
3. Step 3: Cross multiply
   22,573.76x = 31,153.68 × 13,142.96
4. Step 4: Simplify right side
   22,573.76x = 409,451,570.09
5. Step 5: Solve for x
   x = 409,451,570.09/22,573.76
6. Step 6: Final answer
   x = 18,138.39