Finding the Fourth Proportional to 142,015.14, 195,981.53 and 78,354.81

Step by Step Solution

1. Step 1: Write the proportion equation
   142,015.14 : 195,981.53 = 78,354.81 : x
2. Step 2: Convert to fraction form
   142,015.14/195,981.53 = 78,354.81/x
3. Step 3: Cross multiply
   142,015.14x = 195,981.53 × 78,354.81
4. Step 4: Simplify right side
   142,015.14x = 15,356,095,154.89
5. Step 5: Solve for x
   x = 15,356,095,154.89/142,015.14
6. Step 6: Final answer
   x = 108,129.99