Finding the Fourth Proportional to 498.72, 686.16 and 436.32

Step by Step Solution

1. Step 1: Write the proportion equation
   498.72 : 686.16 = 436.32 : x
2. Step 2: Convert to fraction form
   498.72/686.16 = 436.32/x
3. Step 3: Cross multiply
   498.72x = 686.16 × 436.32
4. Step 4: Simplify right side
   498.72x = 299,385.33
5. Step 5: Solve for x
   x = 299,385.33/498.72
6. Step 6: Final answer
   x = 600.31