Finding the Fourth Proportional to 8,436.85, 11,647.83 and 5,788.15

Step by Step Solution

1. Step 1: Write the proportion equation
   8,436.85 : 11,647.83 = 5,788.15 : x
2. Step 2: Convert to fraction form
   8,436.85/11,647.83 = 5,788.15/x
3. Step 3: Cross multiply
   8,436.85x = 11,647.83 × 5,788.15
4. Step 4: Simplify right side
   8,436.85x = 67,419,401.77
5. Step 5: Solve for x
   x = 67,419,401.77/8,436.85
6. Step 6: Final answer
   x = 7,991.06