Finding the Fourth Proportional to 101,413.49, 139,949.78 and 56,091.33

Step by Step Solution

1. Step 1: Write the proportion equation
   101,413.49 : 139,949.78 = 56,091.33 : x
2. Step 2: Convert to fraction form
   101,413.49/139,949.78 = 56,091.33/x
3. Step 3: Cross multiply
   101,413.49x = 139,949.78 × 56,091.33
4. Step 4: Simplify right side
   101,413.49x = 7,849,969,012.95
5. Step 5: Solve for x
   x = 7,849,969,012.95/101,413.49
6. Step 6: Final answer
   x = 77,405.57