Finding the Fourth Proportional to 1,766.87, 2,439.27 and 1,208.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,766.87 : 2,439.27 = 1,208.15 : x
2. Step 2: Convert to fraction form
   1,766.87/2,439.27 = 1,208.15/x
3. Step 3: Cross multiply
   1,766.87x = 2,439.27 × 1,208.15
4. Step 4: Simplify right side
   1,766.87x = 2,946,991.85
5. Step 5: Solve for x
   x = 2,946,991.85/1,766.87
6. Step 6: Final answer
   x = 1,667.92