Finding the Fourth Proportional to 42,016.09, 63,017.65 and 18,638.41

Step by Step Solution

1. Step 1: Write the proportion equation
   42,016.09 : 63,017.65 = 18,638.41 : x
2. Step 2: Convert to fraction form
   42,016.09/63,017.65 = 18,638.41/x
3. Step 3: Cross multiply
   42,016.09x = 63,017.65 × 18,638.41
4. Step 4: Simplify right side
   42,016.09x = 1,174,548,797.94
5. Step 5: Solve for x
   x = 1,174,548,797.94/42,016.09
6. Step 6: Final answer
   x = 27,954.74