Finding the Fourth Proportional to 21,122.72, 31,686.96 and 7,268

Step by Step Solution

1. Step 1: Write the proportion equation
   21,122.72 : 31,686.96 = 7,268 : x
2. Step 2: Convert to fraction form
   21,122.72/31,686.96 = 7,268/x
3. Step 3: Cross multiply
   21,122.72x = 31,686.96 × 7,268
4. Step 4: Simplify right side
   21,122.72x = 230,300,825.28
5. Step 5: Solve for x
   x = 230,300,825.28/21,122.72
6. Step 6: Final answer
   x = 10,902.99