Finding the Fourth Proportional to 8,648.09, 12,964.46 and 3,172.25

Step by Step Solution

1. Step 1: Write the proportion equation
   8,648.09 : 12,964.46 = 3,172.25 : x
2. Step 2: Convert to fraction form
   8,648.09/12,964.46 = 3,172.25/x
3. Step 3: Cross multiply
   8,648.09x = 12,964.46 × 3,172.25
4. Step 4: Simplify right side
   8,648.09x = 41,126,492.37
5. Step 5: Solve for x
   x = 41,126,492.37/8,648.09
6. Step 6: Final answer
   x = 4,755.56