Finding the Fourth Proportional to 1,072.53, 1,479.82 and 630.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,072.53 : 1,479.82 = 630.34 : x
2. Step 2: Convert to fraction form
   1,072.53/1,479.82 = 630.34/x
3. Step 3: Cross multiply
   1,072.53x = 1,479.82 × 630.34
4. Step 4: Simplify right side
   1,072.53x = 932,789.74
5. Step 5: Solve for x
   x = 932,789.74/1,072.53
6. Step 6: Final answer
   x = 869.71