Finding the Fourth Proportional to 42,016.72, 62,991.06 and 15,717.64

Step by Step Solution

1. Step 1: Write the proportion equation
   42,016.72 : 62,991.06 = 15,717.64 : x
2. Step 2: Convert to fraction form
   42,016.72/62,991.06 = 15,717.64/x
3. Step 3: Cross multiply
   42,016.72x = 62,991.06 × 15,717.64
4. Step 4: Simplify right side
   42,016.72x = 990,070,804.30
5. Step 5: Solve for x
   x = 990,070,804.30/42,016.72
6. Step 6: Final answer
   x = 23,563.73