Finding the Fourth Proportional to 1,048.88, 1,447.35 and 629.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,048.88 : 1,447.35 = 629.12 : x
2. Step 2: Convert to fraction form
   1,048.88/1,447.35 = 629.12/x
3. Step 3: Cross multiply
   1,048.88x = 1,447.35 × 629.12
4. Step 4: Simplify right side
   1,048.88x = 910,556.83
5. Step 5: Solve for x
   x = 910,556.83/1,048.88
6. Step 6: Final answer
   x = 868.12