Finding the Fourth Proportional to 22,128.16, 30,513.78 and 17,093.20

Step by Step Solution

1. Step 1: Write the proportion equation
   22,128.16 : 30,513.78 = 17,093.20 : x
2. Step 2: Convert to fraction form
   22,128.16/30,513.78 = 17,093.20/x
3. Step 3: Cross multiply
   22,128.16x = 30,513.78 × 17,093.20
4. Step 4: Simplify right side
   22,128.16x = 521,578,144.30
5. Step 5: Solve for x
   x = 521,578,144.30/22,128.16
6. Step 6: Final answer
   x = 23,570.79