Finding the Fourth Proportional to 257,314.86, 354,651.18 and 171,119.79

Step by Step Solution

1. Step 1: Write the proportion equation
   257,314.86 : 354,651.18 = 171,119.79 : x
2. Step 2: Convert to fraction form
   257,314.86/354,651.18 = 171,119.79/x
3. Step 3: Cross multiply
   257,314.86x = 354,651.18 × 171,119.79
4. Step 4: Simplify right side
   257,314.86x = 60,687,834,803.15
5. Step 5: Solve for x
   x = 60,687,834,803.15/257,314.86
6. Step 6: Final answer
   x = 235,850.49