Finding the Fourth Proportional to 1,099.29, 1,517.17 and 627.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,099.29 : 1,517.17 = 627.10 : x
2. Step 2: Convert to fraction form
   1,099.29/1,517.17 = 627.10/x
3. Step 3: Cross multiply
   1,099.29x = 1,517.17 × 627.10
4. Step 4: Simplify right side
   1,099.29x = 951,411.95
5. Step 5: Solve for x
   x = 951,411.95/1,099.29
6. Step 6: Final answer
   x = 865.48