Finding the Fourth Proportional to 9,418.64, 12,997.72 and 5,227.68

Step by Step Solution

1. Step 1: Write the proportion equation
   9,418.64 : 12,997.72 = 5,227.68 : x
2. Step 2: Convert to fraction form
   9,418.64/12,997.72 = 5,227.68/x
3. Step 3: Cross multiply
   9,418.64x = 12,997.72 × 5,227.68
4. Step 4: Simplify right side
   9,418.64x = 67,947,920.89
5. Step 5: Solve for x
   x = 67,947,920.89/9,418.64
6. Step 6: Final answer
   x = 7,214.20