Finding the Fourth Proportional to 21,039, 31,569.30 and 10,651.02

Step by Step Solution

1. Step 1: Write the proportion equation
   21,039 : 31,569.30 = 10,651.02 : x
2. Step 2: Convert to fraction form
   21,039/31,569.30 = 10,651.02/x
3. Step 3: Cross multiply
   21,039x = 31,569.30 × 10,651.02
4. Step 4: Simplify right side
   21,039x = 336,245,245.69
5. Step 5: Solve for x
   x = 336,245,245.69/21,039
6. Step 6: Final answer
   x = 15,982.00