Finding the Fourth Proportional to 8,921.22, 12,312.72 and 5,786.52

Step by Step Solution

1. Step 1: Write the proportion equation
   8,921.22 : 12,312.72 = 5,786.52 : x
2. Step 2: Convert to fraction form
   8,921.22/12,312.72 = 5,786.52/x
3. Step 3: Cross multiply
   8,921.22x = 12,312.72 × 5,786.52
4. Step 4: Simplify right side
   8,921.22x = 71,247,800.53
5. Step 5: Solve for x
   x = 71,247,800.53/8,921.22
6. Step 6: Final answer
   x = 7,986.33