Finding the Fourth Proportional to 3,987.26, 5,501.98 and 2,308.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,987.26 : 5,501.98 = 2,308.31 : x
2. Step 2: Convert to fraction form
   3,987.26/5,501.98 = 2,308.31/x
3. Step 3: Cross multiply
   3,987.26x = 5,501.98 × 2,308.31
4. Step 4: Simplify right side
   3,987.26x = 12,700,275.45
5. Step 5: Solve for x
   x = 12,700,275.45/3,987.26
6. Step 6: Final answer
   x = 3,185.21