Finding the Fourth Proportional to 142,608.60, 196,800.84 and 78,945.03

Step by Step Solution

1. Step 1: Write the proportion equation
   142,608.60 : 196,800.84 = 78,945.03 : x
2. Step 2: Convert to fraction form
   142,608.60/196,800.84 = 78,945.03/x
3. Step 3: Cross multiply
   142,608.60x = 196,800.84 × 78,945.03
4. Step 4: Simplify right side
   142,608.60x = 15,536,448,217.83
5. Step 5: Solve for x
   x = 15,536,448,217.83/142,608.60
6. Step 6: Final answer
   x = 108,944.68