Finding the Fourth Proportional to 8,648.05, 12,972.28 and 3,101.28

Step by Step Solution

1. Step 1: Write the proportion equation
   8,648.05 : 12,972.28 = 3,101.28 : x
2. Step 2: Convert to fraction form
   8,648.05/12,972.28 = 3,101.28/x
3. Step 3: Cross multiply
   8,648.05x = 12,972.28 × 3,101.28
4. Step 4: Simplify right side
   8,648.05x = 40,230,672.52
5. Step 5: Solve for x
   x = 40,230,672.52/8,648.05
6. Step 6: Final answer
   x = 4,651.99