Finding the Fourth Proportional to 2,810.60, 4,216.86 and 2,489.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,810.60 : 4,216.86 = 2,489.96 : x
2. Step 2: Convert to fraction form
   2,810.60/4,216.86 = 2,489.96/x
3. Step 3: Cross multiply
   2,810.60x = 4,216.86 × 2,489.96
4. Step 4: Simplify right side
   2,810.60x = 10,499,812.73
5. Step 5: Solve for x
   x = 10,499,812.73/2,810.60
6. Step 6: Final answer
   x = 3,735.79