Finding the Fourth Proportional to 1,072.33, 1,479.74 and 630.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,072.33 : 1,479.74 = 630.18 : x
2. Step 2: Convert to fraction form
   1,072.33/1,479.74 = 630.18/x
3. Step 3: Cross multiply
   1,072.33x = 1,479.74 × 630.18
4. Step 4: Simplify right side
   1,072.33x = 932,499.40
5. Step 5: Solve for x
   x = 932,499.40/1,072.33
6. Step 6: Final answer
   x = 869.60