Finding the Fourth Proportional to 21,007.32, 31,530.42 and 10,626.36

Step by Step Solution

1. Step 1: Write the proportion equation
   21,007.32 : 31,530.42 = 10,626.36 : x
2. Step 2: Convert to fraction form
   21,007.32/31,530.42 = 10,626.36/x
3. Step 3: Cross multiply
   21,007.32x = 31,530.42 × 10,626.36
4. Step 4: Simplify right side
   21,007.32x = 335,053,593.87
5. Step 5: Solve for x
   x = 335,053,593.87/21,007.32
6. Step 6: Final answer
   x = 15,949.37