Finding the Fourth Proportional to 8,005.20, 12,067.85 and 7,469.99

Step by Step Solution

1. Step 1: Write the proportion equation
   8,005.20 : 12,067.85 = 7,469.99 : x
2. Step 2: Convert to fraction form
   8,005.20/12,067.85 = 7,469.99/x
3. Step 3: Cross multiply
   8,005.20x = 12,067.85 × 7,469.99
4. Step 4: Simplify right side
   8,005.20x = 90,146,711.64
5. Step 5: Solve for x
   x = 90,146,711.64/8,005.20
6. Step 6: Final answer
   x = 11,261.02