Finding the Fourth Proportional to 747.42, 1,031.25 and 498.57

Step by Step Solution

1. Step 1: Write the proportion equation
   747.42 : 1,031.25 = 498.57 : x
2. Step 2: Convert to fraction form
   747.42/1,031.25 = 498.57/x
3. Step 3: Cross multiply
   747.42x = 1,031.25 × 498.57
4. Step 4: Simplify right side
   747.42x = 514,147.82
5. Step 5: Solve for x
   x = 514,147.82/747.42
6. Step 6: Final answer
   x = 687.90