Finding the Fourth Proportional to 3,986.83, 5,501.65 and 2,308.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,986.83 : 5,501.65 = 2,308.15 : x
2. Step 2: Convert to fraction form
   3,986.83/5,501.65 = 2,308.15/x
3. Step 3: Cross multiply
   3,986.83x = 5,501.65 × 2,308.15
4. Step 4: Simplify right side
   3,986.83x = 12,698,633.45
5. Step 5: Solve for x
   x = 12,698,633.45/3,986.83
6. Step 6: Final answer
   x = 3,185.15