Finding the Fourth Proportional to 9,021.18, 12,441.16 and 5,664.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,021.18 : 12,441.16 = 5,664.31 : x
2. Step 2: Convert to fraction form
   9,021.18/12,441.16 = 5,664.31/x
3. Step 3: Cross multiply
   9,021.18x = 12,441.16 × 5,664.31
4. Step 4: Simplify right side
   9,021.18x = 70,470,496.47
5. Step 5: Solve for x
   x = 70,470,496.47/9,021.18
6. Step 6: Final answer
   x = 7,811.68