Finding the Fourth Proportional to 1,099.88, 1,517.86 and 602.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,099.88 : 1,517.86 = 602.55 : x
2. Step 2: Convert to fraction form
   1,099.88/1,517.86 = 602.55/x
3. Step 3: Cross multiply
   1,099.88x = 1,517.86 × 602.55
4. Step 4: Simplify right side
   1,099.88x = 914,575.94
5. Step 5: Solve for x
   x = 914,575.94/1,099.88
6. Step 6: Final answer
   x = 831.53