Finding the Fourth Proportional to 2,088.79, 3,133.69 and 856.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,088.79 : 3,133.69 = 856.17 : x
2. Step 2: Convert to fraction form
   2,088.79/3,133.69 = 856.17/x
3. Step 3: Cross multiply
   2,088.79x = 3,133.69 × 856.17
4. Step 4: Simplify right side
   2,088.79x = 2,682,969.23
5. Step 5: Solve for x
   x = 2,682,969.23/2,088.79
6. Step 6: Final answer
   x = 1,284.46