Finding the Fourth Proportional to 2,160.16, 3,240.71 and 699.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,160.16 : 3,240.71 = 699.29 : x
2. Step 2: Convert to fraction form
   2,160.16/3,240.71 = 699.29/x
3. Step 3: Cross multiply
   2,160.16x = 3,240.71 × 699.29
4. Step 4: Simplify right side
   2,160.16x = 2,266,196.10
5. Step 5: Solve for x
   x = 2,266,196.10/2,160.16
6. Step 6: Final answer
   x = 1,049.09