Finding the Fourth Proportional to 105,413.94, 158,123.21 and 42,263.80

Step by Step Solution

1. Step 1: Write the proportion equation
   105,413.94 : 158,123.21 = 42,263.80 : x
2. Step 2: Convert to fraction form
   105,413.94/158,123.21 = 42,263.80/x
3. Step 3: Cross multiply
   105,413.94x = 158,123.21 × 42,263.80
4. Step 4: Simplify right side
   105,413.94x = 6,682,887,722.80
5. Step 5: Solve for x
   x = 6,682,887,722.80/105,413.94
6. Step 6: Final answer
   x = 63,396.62