Finding the Fourth Proportional to 2,073.89, 3,110.78 and 841.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,073.89 : 3,110.78 = 841.28 : x
2. Step 2: Convert to fraction form
   2,073.89/3,110.78 = 841.28/x
3. Step 3: Cross multiply
   2,073.89x = 3,110.78 × 841.28
4. Step 4: Simplify right side
   2,073.89x = 2,617,023.55
5. Step 5: Solve for x
   x = 2,617,023.55/2,073.89
6. Step 6: Final answer
   x = 1,261.89