Finding the Fourth Proportional to 257,180.72, 354,939.72 and 143,981.60

Step by Step Solution

1. Step 1: Write the proportion equation
   257,180.72 : 354,939.72 = 143,981.60 : x
2. Step 2: Convert to fraction form
   257,180.72/354,939.72 = 143,981.60/x
3. Step 3: Cross multiply
   257,180.72x = 354,939.72 × 143,981.60
4. Step 4: Simplify right side
   257,180.72x = 51,104,788,789.15
5. Step 5: Solve for x
   x = 51,104,788,789.15/257,180.72
6. Step 6: Final answer
   x = 198,711.59