Finding the Fourth Proportional to 498.77, 747.61 and 325.56

Step by Step Solution

1. Step 1: Write the proportion equation
   498.77 : 747.61 = 325.56 : x
2. Step 2: Convert to fraction form
   498.77/747.61 = 325.56/x
3. Step 3: Cross multiply
   498.77x = 747.61 × 325.56
4. Step 4: Simplify right side
   498.77x = 243,391.10
5. Step 5: Solve for x
   x = 243,391.10/498.77
6. Step 6: Final answer
   x = 487.99