Finding the Fourth Proportional to 22,557.42, 31,128.75 and 12,348.43

Step by Step Solution

1. Step 1: Write the proportion equation
   22,557.42 : 31,128.75 = 12,348.43 : x
2. Step 2: Convert to fraction form
   22,557.42/31,128.75 = 12,348.43/x
3. Step 3: Cross multiply
   22,557.42x = 31,128.75 × 12,348.43
4. Step 4: Simplify right side
   22,557.42x = 384,391,112.54
5. Step 5: Solve for x
   x = 384,391,112.54/22,557.42
6. Step 6: Final answer
   x = 17,040.56