Finding the Fourth Proportional to 2,159.95, 3,240.43 and 699.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,159.95 : 3,240.43 = 699.10 : x
2. Step 2: Convert to fraction form
   2,159.95/3,240.43 = 699.10/x
3. Step 3: Cross multiply
   2,159.95x = 3,240.43 × 699.10
4. Step 4: Simplify right side
   2,159.95x = 2,265,385.78
5. Step 5: Solve for x
   x = 2,265,385.78/2,159.95
6. Step 6: Final answer
   x = 1,048.82