Finding the Fourth Proportional to 16,430.22, 22,673.69 and 8,978.22

Step by Step Solution

1. Step 1: Write the proportion equation
   16,430.22 : 22,673.69 = 8,978.22 : x
2. Step 2: Convert to fraction form
   16,430.22/22,673.69 = 8,978.22/x
3. Step 3: Cross multiply
   16,430.22x = 22,673.69 × 8,978.22
4. Step 4: Simplify right side
   16,430.22x = 203,569,365.81
5. Step 5: Solve for x
   x = 203,569,365.81/16,430.22
6. Step 6: Final answer
   x = 12,389.94