Finding the Fourth Proportional to 42,443.62, 63,650.37 and 12,449.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,443.62 : 63,650.37 = 12,449.50 : x
2. Step 2: Convert to fraction form
   42,443.62/63,650.37 = 12,449.50/x
3. Step 3: Cross multiply
   42,443.62x = 63,650.37 × 12,449.50
4. Step 4: Simplify right side
   42,443.62x = 792,415,281.32
5. Step 5: Solve for x
   x = 792,415,281.32/42,443.62
6. Step 6: Final answer
   x = 18,669.83