Finding the Fourth Proportional to 399,196.92, 598,581.54 and 162,417.72

Step by Step Solution

1. Step 1: Write the proportion equation
   399,196.92 : 598,581.54 = 162,417.72 : x
2. Step 2: Convert to fraction form
   399,196.92/598,581.54 = 162,417.72/x
3. Step 3: Cross multiply
   399,196.92x = 598,581.54 × 162,417.72
4. Step 4: Simplify right side
   399,196.92x = 97,220,248,960.89
5. Step 5: Solve for x
   x = 97,220,248,960.89/399,196.92
6. Step 6: Final answer
   x = 243,539.58