Finding the Fourth Proportional to 1,099.55, 1,517.42 and 602.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,099.55 : 1,517.42 = 602.22 : x
2. Step 2: Convert to fraction form
   1,099.55/1,517.42 = 602.22/x
3. Step 3: Cross multiply
   1,099.55x = 1,517.42 × 602.22
4. Step 4: Simplify right side
   1,099.55x = 913,820.67
5. Step 5: Solve for x
   x = 913,820.67/1,099.55
6. Step 6: Final answer
   x = 831.09