Finding the Fourth Proportional to 42,441.62, 63,647.38 and 12,447.53

Step by Step Solution

1. Step 1: Write the proportion equation
   42,441.62 : 63,647.38 = 12,447.53 : x
2. Step 2: Convert to fraction form
   42,441.62/63,647.38 = 12,447.53/x
3. Step 3: Cross multiply
   42,441.62x = 63,647.38 × 12,447.53
4. Step 4: Simplify right side
   42,441.62x = 792,252,291.50
5. Step 5: Solve for x
   x = 792,252,291.50/42,441.62
6. Step 6: Final answer
   x = 18,666.87