Finding the Fourth Proportional to 142,500.27, 196,649.55 and 78,836.70

Step by Step Solution

1. Step 1: Write the proportion equation
   142,500.27 : 196,649.55 = 78,836.70 : x
2. Step 2: Convert to fraction form
   142,500.27/196,649.55 = 78,836.70/x
3. Step 3: Cross multiply
   142,500.27x = 196,649.55 × 78,836.70
4. Step 4: Simplify right side
   142,500.27x = 15,503,201,578.49
5. Step 5: Solve for x
   x = 15,503,201,578.49/142,500.27
6. Step 6: Final answer
   x = 108,794.19