Finding the Fourth Proportional to 21,792.72, 32,669.37 and 7,938.48

Step by Step Solution

1. Step 1: Write the proportion equation
   21,792.72 : 32,669.37 = 7,938.48 : x
2. Step 2: Convert to fraction form
   21,792.72/32,669.37 = 7,938.48/x
3. Step 3: Cross multiply
   21,792.72x = 32,669.37 × 7,938.48
4. Step 4: Simplify right side
   21,792.72x = 259,345,140.36
5. Step 5: Solve for x
   x = 259,345,140.36/21,792.72
6. Step 6: Final answer
   x = 11,900.54