Finding the Fourth Proportional to 2,978.88, 4,107.62 and 1,859.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.88 : 4,107.62 = 1,859.42 : x
2. Step 2: Convert to fraction form
   2,978.88/4,107.62 = 1,859.42/x
3. Step 3: Cross multiply
   2,978.88x = 4,107.62 × 1,859.42
4. Step 4: Simplify right side
   2,978.88x = 7,637,760.95
5. Step 5: Solve for x
   x = 7,637,760.95/2,978.88
6. Step 6: Final answer
   x = 2,563.97