Finding the Fourth Proportional to 9,419.20, 12,997.56 and 5,227.04

Step by Step Solution

1. Step 1: Write the proportion equation
   9,419.20 : 12,997.56 = 5,227.04 : x
2. Step 2: Convert to fraction form
   9,419.20/12,997.56 = 5,227.04/x
3. Step 3: Cross multiply
   9,419.20x = 12,997.56 × 5,227.04
4. Step 4: Simplify right side
   9,419.20x = 67,938,766.02
5. Step 5: Solve for x
   x = 67,938,766.02/9,419.20
6. Step 6: Final answer
   x = 7,212.80