Finding the Fourth Proportional to 8,662.03, 12,987.85 and 3,976.18

Step by Step Solution

1. Step 1: Write the proportion equation
   8,662.03 : 12,987.85 = 3,976.18 : x
2. Step 2: Convert to fraction form
   8,662.03/12,987.85 = 3,976.18/x
3. Step 3: Cross multiply
   8,662.03x = 12,987.85 × 3,976.18
4. Step 4: Simplify right side
   8,662.03x = 51,642,029.41
5. Step 5: Solve for x
   x = 51,642,029.41/8,662.03
6. Step 6: Final answer
   x = 5,961.89