Finding the Fourth Proportional to 31,990.57, 44,161.15 and 20,665.59

Step by Step Solution

1. Step 1: Write the proportion equation
   31,990.57 : 44,161.15 = 20,665.59 : x
2. Step 2: Convert to fraction form
   31,990.57/44,161.15 = 20,665.59/x
3. Step 3: Cross multiply
   31,990.57x = 44,161.15 × 20,665.59
4. Step 4: Simplify right side
   31,990.57x = 912,616,219.83
5. Step 5: Solve for x
   x = 912,616,219.83/31,990.57
6. Step 6: Final answer
   x = 28,527.66