Finding the Fourth Proportional to 22,108.78, 33,128.34 and 13,202.29

Step by Step Solution

1. Step 1: Write the proportion equation
   22,108.78 : 33,128.34 = 13,202.29 : x
2. Step 2: Convert to fraction form
   22,108.78/33,128.34 = 13,202.29/x
3. Step 3: Cross multiply
   22,108.78x = 33,128.34 × 13,202.29
4. Step 4: Simplify right side
   22,108.78x = 437,369,951.90
5. Step 5: Solve for x
   x = 437,369,951.90/22,108.78
6. Step 6: Final answer
   x = 19,782.64