Finding the Fourth Proportional to 2,740.29, 4,111.61 and 891.97

Step by Step Solution

1. Step 1: Write the proportion equation
   2,740.29 : 4,111.61 = 891.97 : x
2. Step 2: Convert to fraction form
   2,740.29/4,111.61 = 891.97/x
3. Step 3: Cross multiply
   2,740.29x = 4,111.61 × 891.97
4. Step 4: Simplify right side
   2,740.29x = 3,667,432.77
5. Step 5: Solve for x
   x = 3,667,432.77/2,740.29
6. Step 6: Final answer
   x = 1,338.34