Finding the Fourth Proportional to 2,859.30, 3,993.30 and 2,859.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,859.30 : 3,993.30 = 2,859.30 : x
2. Step 2: Convert to fraction form
   2,859.30/3,993.30 = 2,859.30/x
3. Step 3: Cross multiply
   2,859.30x = 3,993.30 × 2,859.30
4. Step 4: Simplify right side
   2,859.30x = 11,418,042.69
5. Step 5: Solve for x
   x = 11,418,042.69/2,859.30
6. Step 6: Final answer
   x = 3,993.30