Finding the Fourth Proportional to 105,413.10, 145,513.36 and 71,468.08

Step by Step Solution

1. Step 1: Write the proportion equation
   105,413.10 : 145,513.36 = 71,468.08 : x
2. Step 2: Convert to fraction form
   105,413.10/145,513.36 = 71,468.08/x
3. Step 3: Cross multiply
   105,413.10x = 145,513.36 × 71,468.08
4. Step 4: Simplify right side
   105,413.10x = 10,399,560,453.55
5. Step 5: Solve for x
   x = 10,399,560,453.55/105,413.10
6. Step 6: Final answer
   x = 98,655.29