Finding the Fourth Proportional to 9,419.76, 12,998.88 and 5,227.92

Step by Step Solution

1. Step 1: Write the proportion equation
   9,419.76 : 12,998.88 = 5,227.92 : x
2. Step 2: Convert to fraction form
   9,419.76/12,998.88 = 5,227.92/x
3. Step 3: Cross multiply
   9,419.76x = 12,998.88 × 5,227.92
4. Step 4: Simplify right side
   9,419.76x = 67,957,104.73
5. Step 5: Solve for x
   x = 67,957,104.73/9,419.76
6. Step 6: Final answer
   x = 7,214.31