Finding the Fourth Proportional to 2,086.71, 2,880.80 and 1,660.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.71 : 2,880.80 = 1,660.50 : x
2. Step 2: Convert to fraction form
   2,086.71/2,880.80 = 1,660.50/x
3. Step 3: Cross multiply
   2,086.71x = 2,880.80 × 1,660.50
4. Step 4: Simplify right side
   2,086.71x = 4,783,560.10
5. Step 5: Solve for x
   x = 4,783,560.10/2,086.71
6. Step 6: Final answer
   x = 2,292.39