Finding the Fourth Proportional to 42,418.79, 63,636.38 and 16,121.48

Step by Step Solution

1. Step 1: Write the proportion equation
   42,418.79 : 63,636.38 = 16,121.48 : x
2. Step 2: Convert to fraction form
   42,418.79/63,636.38 = 16,121.48/x
3. Step 3: Cross multiply
   42,418.79x = 63,636.38 × 16,121.48
4. Step 4: Simplify right side
   42,418.79x = 1,025,912,669.73
5. Step 5: Solve for x
   x = 1,025,912,669.73/42,418.79
6. Step 6: Final answer
   x = 24,185.34