Finding the Fourth Proportional to 139,413.48, 209,002.66 and 60,468.26

Step by Step Solution

1. Step 1: Write the proportion equation
   139,413.48 : 209,002.66 = 60,468.26 : x
2. Step 2: Convert to fraction form
   139,413.48/209,002.66 = 60,468.26/x
3. Step 3: Cross multiply
   139,413.48x = 209,002.66 × 60,468.26
4. Step 4: Simplify right side
   139,413.48x = 12,638,027,185.57
5. Step 5: Solve for x
   x = 12,638,027,185.57/139,413.48
6. Step 6: Final answer
   x = 90,651.40