Finding the Fourth Proportional to 1,268.43, 1,902.89 and 498.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,268.43 : 1,902.89 = 498.99 : x
2. Step 2: Convert to fraction form
   1,268.43/1,902.89 = 498.99/x
3. Step 3: Cross multiply
   1,268.43x = 1,902.89 × 498.99
4. Step 4: Simplify right side
   1,268.43x = 949,520.59
5. Step 5: Solve for x
   x = 949,520.59/1,268.43
6. Step 6: Final answer
   x = 748.58