Finding the Fourth Proportional to 3,900.90, 5,383.98 and 2,329.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,900.90 : 5,383.98 = 2,329.86 : x
2. Step 2: Convert to fraction form
   3,900.90/5,383.98 = 2,329.86/x
3. Step 3: Cross multiply
   3,900.90x = 5,383.98 × 2,329.86
4. Step 4: Simplify right side
   3,900.90x = 12,543,919.64
5. Step 5: Solve for x
   x = 12,543,919.64/3,900.90
6. Step 6: Final answer
   x = 3,215.65