Finding the Fourth Proportional to 142,168.53, 196,187.40 and 78,504.96

Step by Step Solution

1. Step 1: Write the proportion equation
   142,168.53 : 196,187.40 = 78,504.96 : x
2. Step 2: Convert to fraction form
   142,168.53/196,187.40 = 78,504.96/x
3. Step 3: Cross multiply
   142,168.53x = 196,187.40 × 78,504.96
4. Step 4: Simplify right side
   142,168.53x = 15,401,683,989.50
5. Step 5: Solve for x
   x = 15,401,683,989.50/142,168.53
6. Step 6: Final answer
   x = 108,333.99