Finding the Fourth Proportional to 139,372.29, 192,413.52 and 91,764

Step by Step Solution

1. Step 1: Write the proportion equation
   139,372.29 : 192,413.52 = 91,764 : x
2. Step 2: Convert to fraction form
   139,372.29/192,413.52 = 91,764/x
3. Step 3: Cross multiply
   139,372.29x = 192,413.52 × 91,764
4. Step 4: Simplify right side
   139,372.29x = 17,656,634,249.28
5. Step 5: Solve for x
   x = 17,656,634,249.28/139,372.29
6. Step 6: Final answer
   x = 126,686.83