Finding the Fourth Proportional to 1,101.53, 1,520.15 and 629.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,101.53 : 1,520.15 = 629.33 : x
2. Step 2: Convert to fraction form
   1,101.53/1,520.15 = 629.33/x
3. Step 3: Cross multiply
   1,101.53x = 1,520.15 × 629.33
4. Step 4: Simplify right side
   1,101.53x = 956,665.25
5. Step 5: Solve for x
   x = 956,665.25/1,101.53
6. Step 6: Final answer
   x = 868.49