Finding the Fourth Proportional to 142,109.50, 196,107.32 and 78,445.94

Step by Step Solution

1. Step 1: Write the proportion equation
   142,109.50 : 196,107.32 = 78,445.94 : x
2. Step 2: Convert to fraction form
   142,109.50/196,107.32 = 78,445.94/x
3. Step 3: Cross multiply
   142,109.50x = 196,107.32 × 78,445.94
4. Step 4: Simplify right side
   142,109.50x = 15,383,823,058.28
5. Step 5: Solve for x
   x = 15,383,823,058.28/142,109.50
6. Step 6: Final answer
   x = 108,253.31