Finding the Fourth Proportional to 2,891.88, 3,992.72 and 1,949.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,891.88 : 3,992.72 = 1,949.07 : x
2. Step 2: Convert to fraction form
   2,891.88/3,992.72 = 1,949.07/x
3. Step 3: Cross multiply
   2,891.88x = 3,992.72 × 1,949.07
4. Step 4: Simplify right side
   2,891.88x = 7,782,090.77
5. Step 5: Solve for x
   x = 7,782,090.77/2,891.88
6. Step 6: Final answer
   x = 2,691.01