Finding the Fourth Proportional to 2,315.88, 3,475.17 and 856.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,315.88 : 3,475.17 = 856.04 : x
2. Step 2: Convert to fraction form
   2,315.88/3,475.17 = 856.04/x
3. Step 3: Cross multiply
   2,315.88x = 3,475.17 × 856.04
4. Step 4: Simplify right side
   2,315.88x = 2,974,867.15
5. Step 5: Solve for x
   x = 2,974,867.15/2,315.88
6. Step 6: Final answer
   x = 1,284.55