Finding the Fourth Proportional to 22,660.16, 31,271 and 12,589.54

Step by Step Solution

1. Step 1: Write the proportion equation
   22,660.16 : 31,271 = 12,589.54 : x
2. Step 2: Convert to fraction form
   22,660.16/31,271 = 12,589.54/x
3. Step 3: Cross multiply
   22,660.16x = 31,271 × 12,589.54
4. Step 4: Simplify right side
   22,660.16x = 393,687,505.34
5. Step 5: Solve for x
   x = 393,687,505.34/22,660.16
6. Step 6: Final answer
   x = 17,373.55