Finding the Fourth Proportional to 42,443.35, 63,674.89 and 12,456.38

Step by Step Solution

1. Step 1: Write the proportion equation
   42,443.35 : 63,674.89 = 12,456.38 : x
2. Step 2: Convert to fraction form
   42,443.35/63,674.89 = 12,456.38/x
3. Step 3: Cross multiply
   42,443.35x = 63,674.89 × 12,456.38
4. Step 4: Simplify right side
   42,443.35x = 793,158,754.34
5. Step 5: Solve for x
   x = 793,158,754.34/42,443.35
6. Step 6: Final answer
   x = 18,687.47