Finding the Fourth Proportional to 1,048.98, 1,447.30 and 629.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,048.98 : 1,447.30 = 629.15 : x
2. Step 2: Convert to fraction form
   1,048.98/1,447.30 = 629.15/x
3. Step 3: Cross multiply
   1,048.98x = 1,447.30 × 629.15
4. Step 4: Simplify right side
   1,048.98x = 910,568.80
5. Step 5: Solve for x
   x = 910,568.80/1,048.98
6. Step 6: Final answer
   x = 868.05