Finding the Fourth Proportional to 39,144.78, 58,721.73 and 14,196.57

Step by Step Solution

1. Step 1: Write the proportion equation
   39,144.78 : 58,721.73 = 14,196.57 : x
2. Step 2: Convert to fraction form
   39,144.78/58,721.73 = 14,196.57/x
3. Step 3: Cross multiply
   39,144.78x = 58,721.73 × 14,196.57
4. Step 4: Simplify right side
   39,144.78x = 833,647,150.47
5. Step 5: Solve for x
   x = 833,647,150.47/39,144.78
6. Step 6: Final answer
   x = 21,296.51