Finding the Fourth Proportional to 42,007.21, 63,022.69 and 12,424.93

Step by Step Solution

1. Step 1: Write the proportion equation
   42,007.21 : 63,022.69 = 12,424.93 : x
2. Step 2: Convert to fraction form
   42,007.21/63,022.69 = 12,424.93/x
3. Step 3: Cross multiply
   42,007.21x = 63,022.69 × 12,424.93
4. Step 4: Simplify right side
   42,007.21x = 783,052,369.64
5. Step 5: Solve for x
   x = 783,052,369.64/42,007.21
6. Step 6: Final answer
   x = 18,640.91