Finding the Fourth Proportional to 142,520.48, 196,676.69 and 78,858.73

Step by Step Solution

1. Step 1: Write the proportion equation
   142,520.48 : 196,676.69 = 78,858.73 : x
2. Step 2: Convert to fraction form
   142,520.48/196,676.69 = 78,858.73/x
3. Step 3: Cross multiply
   142,520.48x = 196,676.69 × 78,858.73
4. Step 4: Simplify right side
   142,520.48x = 15,509,673,994.00
5. Step 5: Solve for x
   x = 15,509,673,994.00/142,520.48
6. Step 6: Final answer
   x = 108,824.18