Finding the Fourth Proportional to 2,868.72, 3,958.70 and 1,806.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,868.72 : 3,958.70 = 1,806.18 : x
2. Step 2: Convert to fraction form
   2,868.72/3,958.70 = 1,806.18/x
3. Step 3: Cross multiply
   2,868.72x = 3,958.70 × 1,806.18
4. Step 4: Simplify right side
   2,868.72x = 7,150,115.74
5. Step 5: Solve for x
   x = 7,150,115.74/2,868.72
6. Step 6: Final answer
   x = 2,492.44