Finding the Fourth Proportional to 8,492.45, 12,643.29 and 8,451.27

Step by Step Solution

1. Step 1: Write the proportion equation
   8,492.45 : 12,643.29 = 8,451.27 : x
2. Step 2: Convert to fraction form
   8,492.45/12,643.29 = 8,451.27/x
3. Step 3: Cross multiply
   8,492.45x = 12,643.29 × 8,451.27
4. Step 4: Simplify right side
   8,492.45x = 106,851,857.48
5. Step 5: Solve for x
   x = 106,851,857.48/8,492.45
6. Step 6: Final answer
   x = 12,581.99