Finding the Fourth Proportional to 257,613.62, 355,494.29 and 142,896.83

Step by Step Solution

1. Step 1: Write the proportion equation
   257,613.62 : 355,494.29 = 142,896.83 : x
2. Step 2: Convert to fraction form
   257,613.62/355,494.29 = 142,896.83/x
3. Step 3: Cross multiply
   257,613.62x = 355,494.29 × 142,896.83
4. Step 4: Simplify right side
   257,613.62x = 50,799,004,632.15
5. Step 5: Solve for x
   x = 50,799,004,632.15/257,613.62
6. Step 6: Final answer
   x = 197,190.68