Finding the Fourth Proportional to 2,606.82, 3,893.18 and 2,087.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,606.82 : 3,893.18 = 2,087.61 : x
2. Step 2: Convert to fraction form
   2,606.82/3,893.18 = 2,087.61/x
3. Step 3: Cross multiply
   2,606.82x = 3,893.18 × 2,087.61
4. Step 4: Simplify right side
   2,606.82x = 8,127,441.50
5. Step 5: Solve for x
   x = 8,127,441.50/2,606.82
6. Step 6: Final answer
   x = 3,117.76