Finding the Fourth Proportional to 8,892.72, 12,272.76 and 5,166

Step by Step Solution

1. Step 1: Write the proportion equation
   8,892.72 : 12,272.76 = 5,166 : x
2. Step 2: Convert to fraction form
   8,892.72/12,272.76 = 5,166/x
3. Step 3: Cross multiply
   8,892.72x = 12,272.76 × 5,166
4. Step 4: Simplify right side
   8,892.72x = 63,401,078.16
5. Step 5: Solve for x
   x = 63,401,078.16/8,892.72
6. Step 6: Final answer
   x = 7,129.55