Finding the Fourth Proportional to 9,419.52, 12,998.43 and 5,227.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,419.52 : 12,998.43 = 5,227.50 : x
2. Step 2: Convert to fraction form
   9,419.52/12,998.43 = 5,227.50/x
3. Step 3: Cross multiply
   9,419.52x = 12,998.43 × 5,227.50
4. Step 4: Simplify right side
   9,419.52x = 67,949,292.83
5. Step 5: Solve for x
   x = 67,949,292.83/9,419.52
6. Step 6: Final answer
   x = 7,213.67