Finding the Fourth Proportional to 2,069.40, 3,105.30 and 1,901.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,069.40 : 3,105.30 = 1,901.91 : x
2. Step 2: Convert to fraction form
   2,069.40/3,105.30 = 1,901.91/x
3. Step 3: Cross multiply
   2,069.40x = 3,105.30 × 1,901.91
4. Step 4: Simplify right side
   2,069.40x = 5,906,001.12
5. Step 5: Solve for x
   x = 5,906,001.12/2,069.40
6. Step 6: Final answer
   x = 2,853.97