Finding the Fourth Proportional to 142,016.49, 195,982.34 and 78,354.34

Step by Step Solution

1. Step 1: Write the proportion equation
   142,016.49 : 195,982.34 = 78,354.34 : x
2. Step 2: Convert to fraction form
   142,016.49/195,982.34 = 78,354.34/x
3. Step 3: Cross multiply
   142,016.49x = 195,982.34 × 78,354.34
4. Step 4: Simplify right side
   142,016.49x = 15,356,066,020.63
5. Step 5: Solve for x
   x = 15,356,066,020.63/142,016.49
6. Step 6: Final answer
   x = 108,128.75