Finding the Fourth Proportional to 2,783.90, 3,859.37 and 2,635.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,783.90 : 3,859.37 = 2,635.94 : x
2. Step 2: Convert to fraction form
   2,783.90/3,859.37 = 2,635.94/x
3. Step 3: Cross multiply
   2,783.90x = 3,859.37 × 2,635.94
4. Step 4: Simplify right side
   2,783.90x = 10,173,067.76
5. Step 5: Solve for x
   x = 10,173,067.76/2,783.90
6. Step 6: Final answer
   x = 3,654.25