Finding the Fourth Proportional to 1,022.22, 1,411.20 and 629.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,022.22 : 1,411.20 = 629.46 : x
2. Step 2: Convert to fraction form
   1,022.22/1,411.20 = 629.46/x
3. Step 3: Cross multiply
   1,022.22x = 1,411.20 × 629.46
4. Step 4: Simplify right side
   1,022.22x = 888,293.95
5. Step 5: Solve for x
   x = 888,293.95/1,022.22
6. Step 6: Final answer
   x = 868.99