Finding the Fourth Proportional to 2,340.43, 3,510.17 and 859.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,340.43 : 3,510.17 = 859.15 : x
2. Step 2: Convert to fraction form
   2,340.43/3,510.17 = 859.15/x
3. Step 3: Cross multiply
   2,340.43x = 3,510.17 × 859.15
4. Step 4: Simplify right side
   2,340.43x = 3,015,762.56
5. Step 5: Solve for x
   x = 3,015,762.56/2,340.43
6. Step 6: Final answer
   x = 1,288.55