Finding the Fourth Proportional to 12,687.14, 19,016.13 and 8,522.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,687.14 : 19,016.13 = 8,522.12 : x
2. Step 2: Convert to fraction form
   12,687.14/19,016.13 = 8,522.12/x
3. Step 3: Cross multiply
   12,687.14x = 19,016.13 × 8,522.12
4. Step 4: Simplify right side
   12,687.14x = 162,057,741.80
5. Step 5: Solve for x
   x = 162,057,741.80/12,687.14
6. Step 6: Final answer
   x = 12,773.39