Finding the Fourth Proportional to 250,725.96, 375,735.31 and 138,456.72

Step by Step Solution

1. Step 1: Write the proportion equation
   250,725.96 : 375,735.31 = 138,456.72 : x
2. Step 2: Convert to fraction form
   250,725.96/375,735.31 = 138,456.72/x
3. Step 3: Cross multiply
   250,725.96x = 375,735.31 × 138,456.72
4. Step 4: Simplify right side
   250,725.96x = 52,023,078,610.78
5. Step 5: Solve for x
   x = 52,023,078,610.78/250,725.96
6. Step 6: Final answer
   x = 207,489.80