Finding the Fourth Proportional to 139,413.61, 209,002.85 and 60,468.38

Step by Step Solution

1. Step 1: Write the proportion equation
   139,413.61 : 209,002.85 = 60,468.38 : x
2. Step 2: Convert to fraction form
   139,413.61/209,002.85 = 60,468.38/x
3. Step 3: Cross multiply
   139,413.61x = 209,002.85 × 60,468.38
4. Step 4: Simplify right side
   139,413.61x = 12,638,063,754.88
5. Step 5: Solve for x
   x = 12,638,063,754.88/139,413.61
6. Step 6: Final answer
   x = 90,651.58