Finding the Fourth Proportional to 2,897.13, 3,992.69 and 2,057.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,897.13 : 3,992.69 = 2,057.87 : x
2. Step 2: Convert to fraction form
   2,897.13/3,992.69 = 2,057.87/x
3. Step 3: Cross multiply
   2,897.13x = 3,992.69 × 2,057.87
4. Step 4: Simplify right side
   2,897.13x = 8,216,406.72
5. Step 5: Solve for x
   x = 8,216,406.72/2,897.13
6. Step 6: Final answer
   x = 2,836.05