Finding the Fourth Proportional to 2,061.40, 3,091.94 and 891.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,061.40 : 3,091.94 = 891.34 : x
2. Step 2: Convert to fraction form
   2,061.40/3,091.94 = 891.34/x
3. Step 3: Cross multiply
   2,061.40x = 3,091.94 × 891.34
4. Step 4: Simplify right side
   2,061.40x = 2,755,969.80
5. Step 5: Solve for x
   x = 2,755,969.80/2,061.40
6. Step 6: Final answer
   x = 1,336.94