Finding the Fourth Proportional to 23,149.60, 31,944.16 and 12,938.72

Step by Step Solution

1. Step 1: Write the proportion equation
   23,149.60 : 31,944.16 = 12,938.72 : x
2. Step 2: Convert to fraction form
   23,149.60/31,944.16 = 12,938.72/x
3. Step 3: Cross multiply
   23,149.60x = 31,944.16 × 12,938.72
4. Step 4: Simplify right side
   23,149.60x = 413,316,541.88
5. Step 5: Solve for x
   x = 413,316,541.88/23,149.60
6. Step 6: Final answer
   x = 17,854.15