Finding the Fourth Proportional to 1,099.63, 1,517.52 and 602.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,099.63 : 1,517.52 = 602.31 : x
2. Step 2: Convert to fraction form
   1,099.63/1,517.52 = 602.31/x
3. Step 3: Cross multiply
   1,099.63x = 1,517.52 × 602.31
4. Step 4: Simplify right side
   1,099.63x = 914,017.47
5. Step 5: Solve for x
   x = 914,017.47/1,099.63
6. Step 6: Final answer
   x = 831.20