Finding the Fourth Proportional to 42,020.51, 63,038.27 and 13,942.25

Step by Step Solution

1. Step 1: Write the proportion equation
   42,020.51 : 63,038.27 = 13,942.25 : x
2. Step 2: Convert to fraction form
   42,020.51/63,038.27 = 13,942.25/x
3. Step 3: Cross multiply
   42,020.51x = 63,038.27 × 13,942.25
4. Step 4: Simplify right side
   42,020.51x = 878,895,481.92
5. Step 5: Solve for x
   x = 878,895,481.92/42,020.51
6. Step 6: Final answer
   x = 20,915.87