Finding the Fourth Proportional to 16,078.32, 22,189.41 and 9,005.40

Step by Step Solution

1. Step 1: Write the proportion equation
   16,078.32 : 22,189.41 = 9,005.40 : x
2. Step 2: Convert to fraction form
   16,078.32/22,189.41 = 9,005.40/x
3. Step 3: Cross multiply
   16,078.32x = 22,189.41 × 9,005.40
4. Step 4: Simplify right side
   16,078.32x = 199,824,512.81
5. Step 5: Solve for x
   x = 199,824,512.81/16,078.32
6. Step 6: Final answer
   x = 12,428.20