Finding the Fourth Proportional to 21,665.72, 29,896.62 and 17,200.28

Step by Step Solution

1. Step 1: Write the proportion equation
   21,665.72 : 29,896.62 = 17,200.28 : x
2. Step 2: Convert to fraction form
   21,665.72/29,896.62 = 17,200.28/x
3. Step 3: Cross multiply
   21,665.72x = 29,896.62 × 17,200.28
4. Step 4: Simplify right side
   21,665.72x = 514,230,235.05
5. Step 5: Solve for x
   x = 514,230,235.05/21,665.72
6. Step 6: Final answer
   x = 23,734.74