Finding the Fourth Proportional to 142,478.38, 196,619.36 and 78,814.81

Step by Step Solution

1. Step 1: Write the proportion equation
   142,478.38 : 196,619.36 = 78,814.81 : x
2. Step 2: Convert to fraction form
   142,478.38/196,619.36 = 78,814.81/x
3. Step 3: Cross multiply
   142,478.38x = 196,619.36 × 78,814.81
4. Step 4: Simplify right side
   142,478.38x = 15,496,517,500.72
5. Step 5: Solve for x
   x = 15,496,517,500.72/142,478.38
6. Step 6: Final answer
   x = 108,763.99