Finding the Fourth Proportional to 1,072.41, 1,480.02 and 630.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,072.41 : 1,480.02 = 630.15 : x
2. Step 2: Convert to fraction form
   1,072.41/1,480.02 = 630.15/x
3. Step 3: Cross multiply
   1,072.41x = 1,480.02 × 630.15
4. Step 4: Simplify right side
   1,072.41x = 932,634.60
5. Step 5: Solve for x
   x = 932,634.60/1,072.41
6. Step 6: Final answer
   x = 869.66