Finding the Fourth Proportional to 21,016.32, 31,544.16 and 10,635.36

Step by Step Solution

1. Step 1: Write the proportion equation
   21,016.32 : 31,544.16 = 10,635.36 : x
2. Step 2: Convert to fraction form
   21,016.32/31,544.16 = 10,635.36/x
3. Step 3: Cross multiply
   21,016.32x = 31,544.16 × 10,635.36
4. Step 4: Simplify right side
   21,016.32x = 335,483,497.50
5. Step 5: Solve for x
   x = 335,483,497.50/21,016.32
6. Step 6: Final answer
   x = 15,963.00