Finding the Fourth Proportional to 2,861.80, 3,947.24 and 2,626.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,861.80 : 3,947.24 = 2,626.51 : x
2. Step 2: Convert to fraction form
   2,861.80/3,947.24 = 2,626.51/x
3. Step 3: Cross multiply
   2,861.80x = 3,947.24 × 2,626.51
4. Step 4: Simplify right side
   2,861.80x = 10,367,471.90
5. Step 5: Solve for x
   x = 10,367,471.90/2,861.80
6. Step 6: Final answer
   x = 3,622.71