Finding the Fourth Proportional to 2,797.72, 3,860.79 and 1,538.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,797.72 : 3,860.79 = 1,538.80 : x
2. Step 2: Convert to fraction form
   2,797.72/3,860.79 = 1,538.80/x
3. Step 3: Cross multiply
   2,797.72x = 3,860.79 × 1,538.80
4. Step 4: Simplify right side
   2,797.72x = 5,940,983.65
5. Step 5: Solve for x
   x = 5,940,983.65/2,797.72
6. Step 6: Final answer
   x = 2,123.51