Finding the Fourth Proportional to 1,049.86, 1,448.78 and 630.44

Step by Step Solution

1. Step 1: Write the proportion equation
   1,049.86 : 1,448.78 = 630.44 : x
2. Step 2: Convert to fraction form
   1,049.86/1,448.78 = 630.44/x
3. Step 3: Cross multiply
   1,049.86x = 1,448.78 × 630.44
4. Step 4: Simplify right side
   1,049.86x = 913,368.86
5. Step 5: Solve for x
   x = 913,368.86/1,049.86
6. Step 6: Final answer
   x = 869.99