Finding the Fourth Proportional to 21,327.05, 31,996.25 and 7,287.05

Step by Step Solution

1. Step 1: Write the proportion equation
   21,327.05 : 31,996.25 = 7,287.05 : x
2. Step 2: Convert to fraction form
   21,327.05/31,996.25 = 7,287.05/x
3. Step 3: Cross multiply
   21,327.05x = 31,996.25 × 7,287.05
4. Step 4: Simplify right side
   21,327.05x = 233,158,273.56
5. Step 5: Solve for x
   x = 233,158,273.56/21,327.05
6. Step 6: Final answer
   x = 10,932.51