Finding the Fourth Proportional to 1,049.88, 1,448.78 and 630.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,049.88 : 1,448.78 = 630.48 : x
2. Step 2: Convert to fraction form
   1,049.88/1,448.78 = 630.48/x
3. Step 3: Cross multiply
   1,049.88x = 1,448.78 × 630.48
4. Step 4: Simplify right side
   1,049.88x = 913,426.81
5. Step 5: Solve for x
   x = 913,426.81/1,049.88
6. Step 6: Final answer
   x = 870.03