Finding the Fourth Proportional to 37,938.78, 52,355.97 and 21,171.78

Step by Step Solution

1. Step 1: Write the proportion equation
   37,938.78 : 52,355.97 = 21,171.78 : x
2. Step 2: Convert to fraction form
   37,938.78/52,355.97 = 21,171.78/x
3. Step 3: Cross multiply
   37,938.78x = 52,355.97 × 21,171.78
4. Step 4: Simplify right side
   37,938.78x = 1,108,469,078.53
5. Step 5: Solve for x
   x = 1,108,469,078.53/37,938.78
6. Step 6: Final answer
   x = 29,217.31