Finding the Fourth Proportional to 22,638.78, 31,241.46 and 13,205.52

Step by Step Solution

1. Step 1: Write the proportion equation
   22,638.78 : 31,241.46 = 13,205.52 : x
2. Step 2: Convert to fraction form
   22,638.78/31,241.46 = 13,205.52/x
3. Step 3: Cross multiply
   22,638.78x = 31,241.46 × 13,205.52
4. Step 4: Simplify right side
   22,638.78x = 412,559,724.86
5. Step 5: Solve for x
   x = 412,559,724.86/22,638.78
6. Step 6: Final answer
   x = 18,223.58