Finding the Fourth Proportional to 257,096.71, 354,707.50 and 149,643.93

Step by Step Solution

1. Step 1: Write the proportion equation
   257,096.71 : 354,707.50 = 149,643.93 : x
2. Step 2: Convert to fraction form
   257,096.71/354,707.50 = 149,643.93/x
3. Step 3: Cross multiply
   257,096.71x = 354,707.50 × 149,643.93
4. Step 4: Simplify right side
   257,096.71x = 53,079,824,300.48
5. Step 5: Solve for x
   x = 53,079,824,300.48/257,096.71
6. Step 6: Final answer
   x = 206,458.59