Finding the Fourth Proportional to 21,131.28, 31,674.24 and 10,750.32

Step by Step Solution

1. Step 1: Write the proportion equation
   21,131.28 : 31,674.24 = 10,750.32 : x
2. Step 2: Convert to fraction form
   21,131.28/31,674.24 = 10,750.32/x
3. Step 3: Cross multiply
   21,131.28x = 31,674.24 × 10,750.32
4. Step 4: Simplify right side
   21,131.28x = 340,508,215.76
5. Step 5: Solve for x
   x = 340,508,215.76/21,131.28
6. Step 6: Final answer
   x = 16,113.94