Finding the Fourth Proportional to 8,815.22, 12,166.18 and 5,680.52

Step by Step Solution

1. Step 1: Write the proportion equation
   8,815.22 : 12,166.18 = 5,680.52 : x
2. Step 2: Convert to fraction form
   8,815.22/12,166.18 = 5,680.52/x
3. Step 3: Cross multiply
   8,815.22x = 12,166.18 × 5,680.52
4. Step 4: Simplify right side
   8,815.22x = 69,110,228.81
5. Step 5: Solve for x
   x = 69,110,228.81/8,815.22
6. Step 6: Final answer
   x = 7,839.88