Finding the Fourth Proportional to 3,987.83, 5,503.03 and 2,309.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,987.83 : 5,503.03 = 2,309.15 : x
2. Step 2: Convert to fraction form
   3,987.83/5,503.03 = 2,309.15/x
3. Step 3: Cross multiply
   3,987.83x = 5,503.03 × 2,309.15
4. Step 4: Simplify right side
   3,987.83x = 12,707,321.72
5. Step 5: Solve for x
   x = 12,707,321.72/3,987.83
6. Step 6: Final answer
   x = 3,186.53