Finding the Fourth Proportional to 1,072.76, 1,479.74 and 679.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,072.76 : 1,479.74 = 679.10 : x
2. Step 2: Convert to fraction form
   1,072.76/1,479.74 = 679.10/x
3. Step 3: Cross multiply
   1,072.76x = 1,479.74 × 679.10
4. Step 4: Simplify right side
   1,072.76x = 1,004,891.43
5. Step 5: Solve for x
   x = 1,004,891.43/1,072.76
6. Step 6: Final answer
   x = 936.73