Finding the Fourth Proportional to 22,592.37, 31,177.10 and 12,520.78

Step by Step Solution

1. Step 1: Write the proportion equation
   22,592.37 : 31,177.10 = 12,520.78 : x
2. Step 2: Convert to fraction form
   22,592.37/31,177.10 = 12,520.78/x
3. Step 3: Cross multiply
   22,592.37x = 31,177.10 × 12,520.78
4. Step 4: Simplify right side
   22,592.37x = 390,361,563.50
5. Step 5: Solve for x
   x = 390,361,563.50/22,592.37
6. Step 6: Final answer
   x = 17,278.47