Finding the Fourth Proportional to 1,071.91, 1,479.27 and 699.13

Step by Step Solution

1. Step 1: Write the proportion equation
   1,071.91 : 1,479.27 = 699.13 : x
2. Step 2: Convert to fraction form
   1,071.91/1,479.27 = 699.13/x
3. Step 3: Cross multiply
   1,071.91x = 1,479.27 × 699.13
4. Step 4: Simplify right side
   1,071.91x = 1,034,202.04
5. Step 5: Solve for x
   x = 1,034,202.04/1,071.91
6. Step 6: Final answer
   x = 964.82