Finding the Fourth Proportional to 1,099.76, 1,517.69 and 602.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,099.76 : 1,517.69 = 602.43 : x
2. Step 2: Convert to fraction form
   1,099.76/1,517.69 = 602.43/x
3. Step 3: Cross multiply
   1,099.76x = 1,517.69 × 602.43
4. Step 4: Simplify right side
   1,099.76x = 914,297.80
5. Step 5: Solve for x
   x = 914,297.80/1,099.76
6. Step 6: Final answer
   x = 831.36