Finding the Fourth Proportional to 2,740.87, 4,111.56 and 891.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,740.87 : 4,111.56 = 891.49 : x
2. Step 2: Convert to fraction form
   2,740.87/4,111.56 = 891.49/x
3. Step 3: Cross multiply
   2,740.87x = 4,111.56 × 891.49
4. Step 4: Simplify right side
   2,740.87x = 3,665,403.38
5. Step 5: Solve for x
   x = 3,665,403.38/2,740.87
6. Step 6: Final answer
   x = 1,337.31