Finding the Fourth Proportional to 8,786.52, 12,128.22 and 5,805

Step by Step Solution

1. Step 1: Write the proportion equation
   8,786.52 : 12,128.22 = 5,805 : x
2. Step 2: Convert to fraction form
   8,786.52/12,128.22 = 5,805/x
3. Step 3: Cross multiply
   8,786.52x = 12,128.22 × 5,805
4. Step 4: Simplify right side
   8,786.52x = 70,404,317.10
5. Step 5: Solve for x
   x = 70,404,317.10/8,786.52
6. Step 6: Final answer
   x = 8,012.76