Finding the Fourth Proportional to 142,167.35, 196,189.73 and 78,503.78

Step by Step Solution

1. Step 1: Write the proportion equation
   142,167.35 : 196,189.73 = 78,503.78 : x
2. Step 2: Convert to fraction form
   142,167.35/196,189.73 = 78,503.78/x
3. Step 3: Cross multiply
   142,167.35x = 196,189.73 × 78,503.78
4. Step 4: Simplify right side
   142,167.35x = 15,401,635,794.52
5. Step 5: Solve for x
   x = 15,401,635,794.52/142,167.35
6. Step 6: Final answer
   x = 108,334.55