Finding the Fourth Proportional to 2,106.80, 2,900.46 and 2,002.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,106.80 : 2,900.46 = 2,002.90 : x
2. Step 2: Convert to fraction form
   2,106.80/2,900.46 = 2,002.90/x
3. Step 3: Cross multiply
   2,106.80x = 2,900.46 × 2,002.90
4. Step 4: Simplify right side
   2,106.80x = 5,809,331.33
5. Step 5: Solve for x
   x = 5,809,331.33/2,106.80
6. Step 6: Final answer
   x = 2,757.42