Finding the Fourth Proportional to 2,899.16, 3,997.50 and 2,691.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,899.16 : 3,997.50 = 2,691.80 : x
2. Step 2: Convert to fraction form
   2,899.16/3,997.50 = 2,691.80/x
3. Step 3: Cross multiply
   2,899.16x = 3,997.50 × 2,691.80
4. Step 4: Simplify right side
   2,899.16x = 10,760,470.50
5. Step 5: Solve for x
   x = 10,760,470.50/2,899.16
6. Step 6: Final answer
   x = 3,711.58