Finding the Fourth Proportional to 142,075.72, 196,064.09 and 78,413.06

Step by Step Solution

1. Step 1: Write the proportion equation
   142,075.72 : 196,064.09 = 78,413.06 : x
2. Step 2: Convert to fraction form
   142,075.72/196,064.09 = 78,413.06/x
3. Step 3: Cross multiply
   142,075.72x = 196,064.09 × 78,413.06
4. Step 4: Simplify right side
   142,075.72x = 15,373,986,086.23
5. Step 5: Solve for x
   x = 15,373,986,086.23/142,075.72
6. Step 6: Final answer
   x = 108,209.80