Finding the Fourth Proportional to 8,722.96, 13,076.52 and 3,172.38

Step by Step Solution

1. Step 1: Write the proportion equation
   8,722.96 : 13,076.52 = 3,172.38 : x
2. Step 2: Convert to fraction form
   8,722.96/13,076.52 = 3,172.38/x
3. Step 3: Cross multiply
   8,722.96x = 13,076.52 × 3,172.38
4. Step 4: Simplify right side
   8,722.96x = 41,483,690.52
5. Step 5: Solve for x
   x = 41,483,690.52/8,722.96
6. Step 6: Final answer
   x = 4,755.69