Finding the Fourth Proportional to 1,072.12, 1,480.00 and 630.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,072.12 : 1,480.00 = 630.04 : x
2. Step 2: Convert to fraction form
   1,072.12/1,480.00 = 630.04/x
3. Step 3: Cross multiply
   1,072.12x = 1,480.00 × 630.04
4. Step 4: Simplify right side
   1,072.12x = 932,456.05
5. Step 5: Solve for x
   x = 932,456.05/1,072.12
6. Step 6: Final answer
   x = 869.74