Finding the Fourth Proportional to 257,818.61, 355,832.49 and 150,388.72

Step by Step Solution

1. Step 1: Write the proportion equation
   257,818.61 : 355,832.49 = 150,388.72 : x
2. Step 2: Convert to fraction form
   257,818.61/355,832.49 = 150,388.72/x
3. Step 3: Cross multiply
   257,818.61x = 355,832.49 × 150,388.72
4. Step 4: Simplify right side
   257,818.61x = 53,513,192,379.89
5. Step 5: Solve for x
   x = 53,513,192,379.89/257,818.61
6. Step 6: Final answer
   x = 207,561.40