Finding the Fourth Proportional to 3,865.47, 5,794.59 and 2,107.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,865.47 : 5,794.59 = 2,107.86 : x
2. Step 2: Convert to fraction form
   3,865.47/5,794.59 = 2,107.86/x
3. Step 3: Cross multiply
   3,865.47x = 5,794.59 × 2,107.86
4. Step 4: Simplify right side
   3,865.47x = 12,214,184.48
5. Step 5: Solve for x
   x = 12,214,184.48/3,865.47
6. Step 6: Final answer
   x = 3,159.82