Finding the Fourth Proportional to 12,965.52, 19,399.04 and 8,022.90

Step by Step Solution

1. Step 1: Write the proportion equation
   12,965.52 : 19,399.04 = 8,022.90 : x
2. Step 2: Convert to fraction form
   12,965.52/19,399.04 = 8,022.90/x
3. Step 3: Cross multiply
   12,965.52x = 19,399.04 × 8,022.90
4. Step 4: Simplify right side
   12,965.52x = 155,636,558.02
5. Step 5: Solve for x
   x = 155,636,558.02/12,965.52
6. Step 6: Final answer
   x = 12,003.88