Finding the Fourth Proportional to 2,104.20, 2,906.82 and 2,017.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,104.20 : 2,906.82 = 2,017.80 : x
2. Step 2: Convert to fraction form
   2,104.20/2,906.82 = 2,017.80/x
3. Step 3: Cross multiply
   2,104.20x = 2,906.82 × 2,017.80
4. Step 4: Simplify right side
   2,104.20x = 5,865,381.40
5. Step 5: Solve for x
   x = 5,865,381.40/2,104.20
6. Step 6: Final answer
   x = 2,787.46