Finding the Fourth Proportional to 22,587.38, 31,171.04 and 13,156.55

Step by Step Solution

1. Step 1: Write the proportion equation
   22,587.38 : 31,171.04 = 13,156.55 : x
2. Step 2: Convert to fraction form
   22,587.38/31,171.04 = 13,156.55/x
3. Step 3: Cross multiply
   22,587.38x = 31,171.04 × 13,156.55
4. Step 4: Simplify right side
   22,587.38x = 410,103,407.79
5. Step 5: Solve for x
   x = 410,103,407.79/22,587.38
6. Step 6: Final answer
   x = 18,156.31