Finding the Fourth Proportional to 142,618.82, 196,806.48 and 78,075.68

Step by Step Solution

1. Step 1: Write the proportion equation
   142,618.82 : 196,806.48 = 78,075.68 : x
2. Step 2: Convert to fraction form
   142,618.82/196,806.48 = 78,075.68/x
3. Step 3: Cross multiply
   142,618.82x = 196,806.48 × 78,075.68
4. Step 4: Simplify right side
   142,618.82x = 15,365,798,380.00
5. Step 5: Solve for x
   x = 15,365,798,380.00/142,618.82
6. Step 6: Final answer
   x = 107,740.33