Finding the Fourth Proportional to 1,099.55, 1,517.52 and 633.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,099.55 : 1,517.52 = 633.89 : x
2. Step 2: Convert to fraction form
   1,099.55/1,517.52 = 633.89/x
3. Step 3: Cross multiply
   1,099.55x = 1,517.52 × 633.89
4. Step 4: Simplify right side
   1,099.55x = 961,933.17
5. Step 5: Solve for x
   x = 961,933.17/1,099.55
6. Step 6: Final answer
   x = 874.85