Finding the Fourth Proportional to 2,870.86, 3,964.12 and 2,339.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,870.86 : 3,964.12 = 2,339.82 : x
2. Step 2: Convert to fraction form
   2,870.86/3,964.12 = 2,339.82/x
3. Step 3: Cross multiply
   2,870.86x = 3,964.12 × 2,339.82
4. Step 4: Simplify right side
   2,870.86x = 9,275,327.26
5. Step 5: Solve for x
   x = 9,275,327.26/2,870.86
6. Step 6: Final answer
   x = 3,230.85