Finding the Fourth Proportional to 101,413.89, 139,945.42 and 56,089.23

Step by Step Solution

1. Step 1: Write the proportion equation
   101,413.89 : 139,945.42 = 56,089.23 : x
2. Step 2: Convert to fraction form
   101,413.89/139,945.42 = 56,089.23/x
3. Step 3: Cross multiply
   101,413.89x = 139,945.42 × 56,089.23
4. Step 4: Simplify right side
   101,413.89x = 7,849,430,395.14
5. Step 5: Solve for x
   x = 7,849,430,395.14/101,413.89
6. Step 6: Final answer
   x = 77,399.95