Finding the Fourth Proportional to 8,999.67, 12,419.01 and 5,222.54

Step by Step Solution

1. Step 1: Write the proportion equation
   8,999.67 : 12,419.01 = 5,222.54 : x
2. Step 2: Convert to fraction form
   8,999.67/12,419.01 = 5,222.54/x
3. Step 3: Cross multiply
   8,999.67x = 12,419.01 × 5,222.54
4. Step 4: Simplify right side
   8,999.67x = 64,858,776.49
5. Step 5: Solve for x
   x = 64,858,776.49/8,999.67
6. Step 6: Final answer
   x = 7,206.79