Finding the Fourth Proportional to 142,477.39, 196,618.98 and 78,819.49

Step by Step Solution

1. Step 1: Write the proportion equation
   142,477.39 : 196,618.98 = 78,819.49 : x
2. Step 2: Convert to fraction form
   142,477.39/196,618.98 = 78,819.49/x
3. Step 3: Cross multiply
   142,477.39x = 196,618.98 × 78,819.49
4. Step 4: Simplify right side
   142,477.39x = 15,497,407,727.92
5. Step 5: Solve for x
   x = 15,497,407,727.92/142,477.39
6. Step 6: Final answer
   x = 108,771.00