Finding the Fourth Proportional to 9,413.02, 12,989.37 and 5,221

Step by Step Solution

1. Step 1: Write the proportion equation
   9,413.02 : 12,989.37 = 5,221 : x
2. Step 2: Convert to fraction form
   9,413.02/12,989.37 = 5,221/x
3. Step 3: Cross multiply
   9,413.02x = 12,989.37 × 5,221
4. Step 4: Simplify right side
   9,413.02x = 67,817,500.77
5. Step 5: Solve for x
   x = 67,817,500.77/9,413.02
6. Step 6: Final answer
   x = 7,204.65