Finding the Fourth Proportional to 2,061.40, 3,077.13 and 1,909.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,061.40 : 3,077.13 = 1,909.12 : x
2. Step 2: Convert to fraction form
   2,061.40/3,077.13 = 1,909.12/x
3. Step 3: Cross multiply
   2,061.40x = 3,077.13 × 1,909.12
4. Step 4: Simplify right side
   2,061.40x = 5,874,600.88
5. Step 5: Solve for x
   x = 5,874,600.88/2,061.40
6. Step 6: Final answer
   x = 2,849.81