Finding the Fourth Proportional to 498.59, 688.05 and 277.53

Step by Step Solution

1. Step 1: Write the proportion equation
   498.59 : 688.05 = 277.53 : x
2. Step 2: Convert to fraction form
   498.59/688.05 = 277.53/x
3. Step 3: Cross multiply
   498.59x = 688.05 × 277.53
4. Step 4: Simplify right side
   498.59x = 190,954.52
5. Step 5: Solve for x
   x = 190,954.52/498.59
6. Step 6: Final answer
   x = 382.99