Finding the Fourth Proportional to 31,580.92, 43,580.19 and 18,142.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,580.92 : 43,580.19 = 18,142.72 : x
2. Step 2: Convert to fraction form
   31,580.92/43,580.19 = 18,142.72/x
3. Step 3: Cross multiply
   31,580.92x = 43,580.19 × 18,142.72
4. Step 4: Simplify right side
   31,580.92x = 790,663,184.72
5. Step 5: Solve for x
   x = 790,663,184.72/31,580.92
6. Step 6: Final answer
   x = 25,036.10