Finding the Fourth Proportional to 142,728.50, 196,914.83 and 85,327.98

Step by Step Solution

1. Step 1: Write the proportion equation
   142,728.50 : 196,914.83 = 85,327.98 : x
2. Step 2: Convert to fraction form
   142,728.50/196,914.83 = 85,327.98/x
3. Step 3: Cross multiply
   142,728.50x = 196,914.83 × 85,327.98
4. Step 4: Simplify right side
   142,728.50x = 16,802,344,249.30
5. Step 5: Solve for x
   x = 16,802,344,249.30/142,728.50
6. Step 6: Final answer
   x = 117,722.42