Finding the Fourth Proportional to 1,072.37, 1,479.84 and 630.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,072.37 : 1,479.84 = 630.27 : x
2. Step 2: Convert to fraction form
   1,072.37/1,479.84 = 630.27/x
3. Step 3: Cross multiply
   1,072.37x = 1,479.84 × 630.27
4. Step 4: Simplify right side
   1,072.37x = 932,698.76
5. Step 5: Solve for x
   x = 932,698.76/1,072.37
6. Step 6: Final answer
   x = 869.76