Finding the Fourth Proportional to 142,321.38, 196,401.99 and 78,659.34

Step by Step Solution

1. Step 1: Write the proportion equation
   142,321.38 : 196,401.99 = 78,659.34 : x
2. Step 2: Convert to fraction form
   142,321.38/196,401.99 = 78,659.34/x
3. Step 3: Cross multiply
   142,321.38x = 196,401.99 × 78,659.34
4. Step 4: Simplify right side
   142,321.38x = 15,448,850,908.09
5. Step 5: Solve for x
   x = 15,448,850,908.09/142,321.38
6. Step 6: Final answer
   x = 108,549.05