Finding the Fourth Proportional to 22,146.28, 30,693.79 and 21,731.56

Step by Step Solution

1. Step 1: Write the proportion equation
   22,146.28 : 30,693.79 = 21,731.56 : x
2. Step 2: Convert to fraction form
   22,146.28/30,693.79 = 21,731.56/x
3. Step 3: Cross multiply
   22,146.28x = 30,693.79 × 21,731.56
4. Step 4: Simplify right side
   22,146.28x = 667,023,939.01
5. Step 5: Solve for x
   x = 667,023,939.01/22,146.28
6. Step 6: Final answer
   x = 30,119.01