Finding the Fourth Proportional to 12,645.72, 18,962.10 and 8,019

Step by Step Solution

1. Step 1: Write the proportion equation
   12,645.72 : 18,962.10 = 8,019 : x
2. Step 2: Convert to fraction form
   12,645.72/18,962.10 = 8,019/x
3. Step 3: Cross multiply
   12,645.72x = 18,962.10 × 8,019
4. Step 4: Simplify right side
   12,645.72x = 152,057,079.90
5. Step 5: Solve for x
   x = 152,057,079.90/12,645.72
6. Step 6: Final answer
   x = 12,024.39