Finding the Fourth Proportional to 1,099.90, 1,517.76 and 602.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,099.90 : 1,517.76 = 602.53 : x
2. Step 2: Convert to fraction form
   1,099.90/1,517.76 = 602.53/x
3. Step 3: Cross multiply
   1,099.90x = 1,517.76 × 602.53
4. Step 4: Simplify right side
   1,099.90x = 914,488.34
5. Step 5: Solve for x
   x = 914,488.34/1,099.90
6. Step 6: Final answer
   x = 831.43