Finding the Fourth Proportional to 3,940.88, 5,908.37 and 1,859.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,940.88 : 5,908.37 = 1,859.69 : x
2. Step 2: Convert to fraction form
   3,940.88/5,908.37 = 1,859.69/x
3. Step 3: Cross multiply
   3,940.88x = 5,908.37 × 1,859.69
4. Step 4: Simplify right side
   3,940.88x = 10,987,697.77
5. Step 5: Solve for x
   x = 10,987,697.77/3,940.88
6. Step 6: Final answer
   x = 2,788.14