Finding the Fourth Proportional to 67,728, 93,467.52 and 39,429.12

Step by Step Solution

1. Step 1: Write the proportion equation
   67,728 : 93,467.52 = 39,429.12 : x
2. Step 2: Convert to fraction form
   67,728/93,467.52 = 39,429.12/x
3. Step 3: Cross multiply
   67,728x = 93,467.52 × 39,429.12
4. Step 4: Simplify right side
   67,728x = 3,685,342,062.18
5. Step 5: Solve for x
   x = 3,685,342,062.18/67,728
6. Step 6: Final answer
   x = 54,413.86