Finding the Fourth Proportional to 498.32, 688.50 and 436.22

Step by Step Solution

1. Step 1: Write the proportion equation
   498.32 : 688.50 = 436.22 : x
2. Step 2: Convert to fraction form
   498.32/688.50 = 436.22/x
3. Step 3: Cross multiply
   498.32x = 688.50 × 436.22
4. Step 4: Simplify right side
   498.32x = 300,337.47
5. Step 5: Solve for x
   x = 300,337.47/498.32
6. Step 6: Final answer
   x = 602.70