Finding the Fourth Proportional to 142,086.05, 196,077.76 and 78,423.84

Step by Step Solution

1. Step 1: Write the proportion equation
   142,086.05 : 196,077.76 = 78,423.84 : x
2. Step 2: Convert to fraction form
   142,086.05/196,077.76 = 78,423.84/x
3. Step 3: Cross multiply
   142,086.05x = 196,077.76 × 78,423.84
4. Step 4: Simplify right side
   142,086.05x = 15,377,170,877.80
5. Step 5: Solve for x
   x = 15,377,170,877.80/142,086.05
6. Step 6: Final answer
   x = 108,224.35