Finding the Fourth Proportional to 42,240.12, 63,345.59 and 20,038.42

Step by Step Solution

1. Step 1: Write the proportion equation
   42,240.12 : 63,345.59 = 20,038.42 : x
2. Step 2: Convert to fraction form
   42,240.12/63,345.59 = 20,038.42/x
3. Step 3: Cross multiply
   42,240.12x = 63,345.59 × 20,038.42
4. Step 4: Simplify right side
   42,240.12x = 1,269,345,537.57
5. Step 5: Solve for x
   x = 1,269,345,537.57/42,240.12
6. Step 6: Final answer
   x = 30,050.71