Finding the Fourth Proportional to 21,728.72, 32,592.38 and 6,938.54

Step by Step Solution

1. Step 1: Write the proportion equation
   21,728.72 : 32,592.38 = 6,938.54 : x
2. Step 2: Convert to fraction form
   21,728.72/32,592.38 = 6,938.54/x
3. Step 3: Cross multiply
   21,728.72x = 32,592.38 × 6,938.54
4. Step 4: Simplify right side
   21,728.72x = 226,143,532.33
5. Step 5: Solve for x
   x = 226,143,532.33/21,728.72
6. Step 6: Final answer
   x = 10,407.59