Finding the Fourth Proportional to 2,706.09, 4,059.38 and 856.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,706.09 : 4,059.38 = 856.72 : x
2. Step 2: Convert to fraction form
   2,706.09/4,059.38 = 856.72/x
3. Step 3: Cross multiply
   2,706.09x = 4,059.38 × 856.72
4. Step 4: Simplify right side
   2,706.09x = 3,477,752.03
5. Step 5: Solve for x
   x = 3,477,752.03/2,706.09
6. Step 6: Final answer
   x = 1,285.16