Finding the Fourth Proportional to 2,685.98, 3,708.38 and 2,189.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,685.98 : 3,708.38 = 2,189.81 : x
2. Step 2: Convert to fraction form
   2,685.98/3,708.38 = 2,189.81/x
3. Step 3: Cross multiply
   2,685.98x = 3,708.38 × 2,189.81
4. Step 4: Simplify right side
   2,685.98x = 8,120,647.61
5. Step 5: Solve for x
   x = 8,120,647.61/2,685.98
6. Step 6: Final answer
   x = 3,023.35