Finding the Fourth Proportional to 257,151.78, 385,579.89 and 137,060.82

Step by Step Solution

1. Step 1: Write the proportion equation
   257,151.78 : 385,579.89 = 137,060.82 : x
2. Step 2: Convert to fraction form
   257,151.78/385,579.89 = 137,060.82/x
3. Step 3: Cross multiply
   257,151.78x = 385,579.89 × 137,060.82
4. Step 4: Simplify right side
   257,151.78x = 52,847,895,898.91
5. Step 5: Solve for x
   x = 52,847,895,898.91/257,151.78
6. Step 6: Final answer
   x = 205,512.46