Finding the Fourth Proportional to 2,898.73, 3,990.56 and 2,766.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,898.73 : 3,990.56 = 2,766.50 : x
2. Step 2: Convert to fraction form
   2,898.73/3,990.56 = 2,766.50/x
3. Step 3: Cross multiply
   2,898.73x = 3,990.56 × 2,766.50
4. Step 4: Simplify right side
   2,898.73x = 11,039,866.02
5. Step 5: Solve for x
   x = 11,039,866.02/2,898.73
6. Step 6: Final answer
   x = 3,808.52