Finding the Fourth Proportional to 16,430.50, 22,674.27 and 8,978.50

Step by Step Solution

1. Step 1: Write the proportion equation
   16,430.50 : 22,674.27 = 8,978.50 : x
2. Step 2: Convert to fraction form
   16,430.50/22,674.27 = 8,978.50/x
3. Step 3: Cross multiply
   16,430.50x = 22,674.27 × 8,978.50
4. Step 4: Simplify right side
   16,430.50x = 203,580,933.20
5. Step 5: Solve for x
   x = 203,580,933.20/16,430.50
6. Step 6: Final answer
   x = 12,390.43