Finding the Fourth Proportional to 329,061.47, 493,229.93 and 215,162.31

Step by Step Solution

1. Step 1: Write the proportion equation
   329,061.47 : 493,229.93 = 215,162.31 : x
2. Step 2: Convert to fraction form
   329,061.47/493,229.93 = 215,162.31/x
3. Step 3: Cross multiply
   329,061.47x = 493,229.93 × 215,162.31
4. Step 4: Simplify right side
   329,061.47x = 106,124,491,099.94
5. Step 5: Solve for x
   x = 106,124,491,099.94/329,061.47
6. Step 6: Final answer
   x = 322,506.59