Finding the Fourth Proportional to 2,740.94, 4,111.61 and 891.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,740.94 : 4,111.61 = 891.91 : x
2. Step 2: Convert to fraction form
   2,740.94/4,111.61 = 891.91/x
3. Step 3: Cross multiply
   2,740.94x = 4,111.61 × 891.91
4. Step 4: Simplify right side
   2,740.94x = 3,667,186.08
5. Step 5: Solve for x
   x = 3,667,186.08/2,740.94
6. Step 6: Final answer
   x = 1,337.93