Finding the Fourth Proportional to 42,653.62, 63,974.85 and 12,667.24

Step by Step Solution

1. Step 1: Write the proportion equation
   42,653.62 : 63,974.85 = 12,667.24 : x
2. Step 2: Convert to fraction form
   42,653.62/63,974.85 = 12,667.24/x
3. Step 3: Cross multiply
   42,653.62x = 63,974.85 × 12,667.24
4. Step 4: Simplify right side
   42,653.62x = 810,384,991.31
5. Step 5: Solve for x
   x = 810,384,991.31/42,653.62
6. Step 6: Final answer
   x = 18,999.21