Finding the Fourth Proportional to 9,413, 12,989.94 and 5,222.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,413 : 12,989.94 = 5,222.12 : x
2. Step 2: Convert to fraction form
   9,413/12,989.94 = 5,222.12/x
3. Step 3: Cross multiply
   9,413x = 12,989.94 × 5,222.12
4. Step 4: Simplify right side
   9,413x = 67,835,025.47
5. Step 5: Solve for x
   x = 67,835,025.47/9,413
6. Step 6: Final answer
   x = 7,206.53