Finding the Fourth Proportional to 31,570.85, 43,568.17 and 18,650.55

Step by Step Solution

1. Step 1: Write the proportion equation
   31,570.85 : 43,568.17 = 18,650.55 : x
2. Step 2: Convert to fraction form
   31,570.85/43,568.17 = 18,650.55/x
3. Step 3: Cross multiply
   31,570.85x = 43,568.17 × 18,650.55
4. Step 4: Simplify right side
   31,570.85x = 812,570,309.59
5. Step 5: Solve for x
   x = 812,570,309.59/31,570.85
6. Step 6: Final answer
   x = 25,737.99