Finding the Fourth Proportional to 2,568.79, 3,855.03 and 1,921.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,568.79 : 3,855.03 = 1,921.24 : x
2. Step 2: Convert to fraction form
   2,568.79/3,855.03 = 1,921.24/x
3. Step 3: Cross multiply
   2,568.79x = 3,855.03 × 1,921.24
4. Step 4: Simplify right side
   2,568.79x = 7,406,437.84
5. Step 5: Solve for x
   x = 7,406,437.84/2,568.79
6. Step 6: Final answer
   x = 2,883.24