Finding the Fourth Proportional to 142,019.06, 195,990.41 and 78,360.96

Step by Step Solution

1. Step 1: Write the proportion equation
   142,019.06 : 195,990.41 = 78,360.96 : x
2. Step 2: Convert to fraction form
   142,019.06/195,990.41 = 78,360.96/x
3. Step 3: Cross multiply
   142,019.06x = 195,990.41 × 78,360.96
4. Step 4: Simplify right side
   142,019.06x = 15,357,996,286.59
5. Step 5: Solve for x
   x = 15,357,996,286.59/142,019.06
6. Step 6: Final answer
   x = 108,140.39