Finding the Fourth Proportional to 2,086.89, 3,105.78 and 2,009.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.89 : 3,105.78 = 2,009.13 : x
2. Step 2: Convert to fraction form
   2,086.89/3,105.78 = 2,009.13/x
3. Step 3: Cross multiply
   2,086.89x = 3,105.78 × 2,009.13
4. Step 4: Simplify right side
   2,086.89x = 6,239,915.77
5. Step 5: Solve for x
   x = 6,239,915.77/2,086.89
6. Step 6: Final answer
   x = 2,990.05