Finding the Fourth Proportional to 2,957.79, 4,085.91 and 2,691.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,957.79 : 4,085.91 = 2,691.81 : x
2. Step 2: Convert to fraction form
   2,957.79/4,085.91 = 2,691.81/x
3. Step 3: Cross multiply
   2,957.79x = 4,085.91 × 2,691.81
4. Step 4: Simplify right side
   2,957.79x = 10,998,493.40
5. Step 5: Solve for x
   x = 10,998,493.40/2,957.79
6. Step 6: Final answer
   x = 3,718.48