Finding the Fourth Proportional to 22,738.47, 31,380.41 and 12,666.58

Step by Step Solution

1. Step 1: Write the proportion equation
   22,738.47 : 31,380.41 = 12,666.58 : x
2. Step 2: Convert to fraction form
   22,738.47/31,380.41 = 12,666.58/x
3. Step 3: Cross multiply
   22,738.47x = 31,380.41 × 12,666.58
4. Step 4: Simplify right side
   22,738.47x = 397,482,426.91
5. Step 5: Solve for x
   x = 397,482,426.91/22,738.47
6. Step 6: Final answer
   x = 17,480.61