Finding the Fourth Proportional to 8,861.86, 12,229.50 and 5,085.64

Step by Step Solution

1. Step 1: Write the proportion equation
   8,861.86 : 12,229.50 = 5,085.64 : x
2. Step 2: Convert to fraction form
   8,861.86/12,229.50 = 5,085.64/x
3. Step 3: Cross multiply
   8,861.86x = 12,229.50 × 5,085.64
4. Step 4: Simplify right side
   8,861.86x = 62,194,834.38
5. Step 5: Solve for x
   x = 62,194,834.38/8,861.86
6. Step 6: Final answer
   x = 7,018.26