Finding the Fourth Proportional to 315,585.56, 435,509.69 and 172,345.61

Step by Step Solution

1. Step 1: Write the proportion equation
   315,585.56 : 435,509.69 = 172,345.61 : x
2. Step 2: Convert to fraction form
   315,585.56/435,509.69 = 172,345.61/x
3. Step 3: Cross multiply
   315,585.56x = 435,509.69 × 172,345.61
4. Step 4: Simplify right side
   315,585.56x = 75,058,183,411.01
5. Step 5: Solve for x
   x = 75,058,183,411.01/315,585.56
6. Step 6: Final answer
   x = 237,837.82