Finding the Fourth Proportional to 42,007.02, 63,022.41 and 12,424.74

Step by Step Solution

1. Step 1: Write the proportion equation
   42,007.02 : 63,022.41 = 12,424.74 : x
2. Step 2: Convert to fraction form
   42,007.02/63,022.41 = 12,424.74/x
3. Step 3: Cross multiply
   42,007.02x = 63,022.41 × 12,424.74
4. Step 4: Simplify right side
   42,007.02x = 783,037,058.42
5. Step 5: Solve for x
   x = 783,037,058.42/42,007.02
6. Step 6: Final answer
   x = 18,640.62