Finding the Fourth Proportional to 2,061.96, 3,091.06 and 891.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,061.96 : 3,091.06 = 891.23 : x
2. Step 2: Convert to fraction form
   2,061.96/3,091.06 = 891.23/x
3. Step 3: Cross multiply
   2,061.96x = 3,091.06 × 891.23
4. Step 4: Simplify right side
   2,061.96x = 2,754,845.40
5. Step 5: Solve for x
   x = 2,754,845.40/2,061.96
6. Step 6: Final answer
   x = 1,336.03