Finding the Fourth Proportional to 2,086.82, 2,878.98 and 1,921.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.82 : 2,878.98 = 1,921.04 : x
2. Step 2: Convert to fraction form
   2,086.82/2,878.98 = 1,921.04/x
3. Step 3: Cross multiply
   2,086.82x = 2,878.98 × 1,921.04
4. Step 4: Simplify right side
   2,086.82x = 5,530,635.74
5. Step 5: Solve for x
   x = 5,530,635.74/2,086.82
6. Step 6: Final answer
   x = 2,650.27