Finding the Fourth Proportional to 1,049.94, 1,448.86 and 630.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,049.94 : 1,448.86 = 630.21 : x
2. Step 2: Convert to fraction form
   1,049.94/1,448.86 = 630.21/x
3. Step 3: Cross multiply
   1,049.94x = 1,448.86 × 630.21
4. Step 4: Simplify right side
   1,049.94x = 913,086.06
5. Step 5: Solve for x
   x = 913,086.06/1,049.94
6. Step 6: Final answer
   x = 869.66