Finding the Fourth Proportional to 42,007.38, 63,023.37 and 12,426.01

Step by Step Solution

1. Step 1: Write the proportion equation
   42,007.38 : 63,023.37 = 12,426.01 : x
2. Step 2: Convert to fraction form
   42,007.38/63,023.37 = 12,426.01/x
3. Step 3: Cross multiply
   42,007.38x = 63,023.37 × 12,426.01
4. Step 4: Simplify right side
   42,007.38x = 783,128,821.70
5. Step 5: Solve for x
   x = 783,128,821.70/42,007.38
6. Step 6: Final answer
   x = 18,642.65