Finding the Fourth Proportional to 8,112.78, 12,172.10 and 2,849.24

Step by Step Solution

1. Step 1: Write the proportion equation
   8,112.78 : 12,172.10 = 2,849.24 : x
2. Step 2: Convert to fraction form
   8,112.78/12,172.10 = 2,849.24/x
3. Step 3: Cross multiply
   8,112.78x = 12,172.10 × 2,849.24
4. Step 4: Simplify right side
   8,112.78x = 34,681,250.39
5. Step 5: Solve for x
   x = 34,681,250.39/8,112.78
6. Step 6: Final answer
   x = 4,274.89