Finding the Fourth Proportional to 8,815.91, 12,166.18 and 5,039.69

Step by Step Solution

1. Step 1: Write the proportion equation
   8,815.91 : 12,166.18 = 5,039.69 : x
2. Step 2: Convert to fraction form
   8,815.91/12,166.18 = 5,039.69/x
3. Step 3: Cross multiply
   8,815.91x = 12,166.18 × 5,039.69
4. Step 4: Simplify right side
   8,815.91x = 61,313,702.25
5. Step 5: Solve for x
   x = 61,313,702.25/8,815.91
6. Step 6: Final answer
   x = 6,954.90