Finding the Fourth Proportional to 22,589.31, 31,173.70 and 13,158.48

Step by Step Solution

1. Step 1: Write the proportion equation
   22,589.31 : 31,173.70 = 13,158.48 : x
2. Step 2: Convert to fraction form
   22,589.31/31,173.70 = 13,158.48/x
3. Step 3: Cross multiply
   22,589.31x = 31,173.70 × 13,158.48
4. Step 4: Simplify right side
   22,589.31x = 410,198,507.98
5. Step 5: Solve for x
   x = 410,198,507.98/22,589.31
6. Step 6: Final answer
   x = 18,158.97