Finding the Fourth Proportional to 257,490.72, 355,233.72 and 160,637.52

Step by Step Solution

1. Step 1: Write the proportion equation
   257,490.72 : 355,233.72 = 160,637.52 : x
2. Step 2: Convert to fraction form
   257,490.72/355,233.72 = 160,637.52/x
3. Step 3: Cross multiply
   257,490.72x = 355,233.72 × 160,637.52
4. Step 4: Simplify right side
   257,490.72x = 57,063,863,801.17
5. Step 5: Solve for x
   x = 57,063,863,801.17/257,490.72
6. Step 6: Final answer
   x = 221,615.22