Finding the Fourth Proportional to 498.55, 688.02 and 277.52

Step by Step Solution

1. Step 1: Write the proportion equation
   498.55 : 688.02 = 277.52 : x
2. Step 2: Convert to fraction form
   498.55/688.02 = 277.52/x
3. Step 3: Cross multiply
   498.55x = 688.02 × 277.52
4. Step 4: Simplify right side
   498.55x = 190,939.31
5. Step 5: Solve for x
   x = 190,939.31/498.55
6. Step 6: Final answer
   x = 382.99