Finding the Fourth Proportional to 142,019.60, 195,977.94 and 78,357.38

Step by Step Solution

1. Step 1: Write the proportion equation
   142,019.60 : 195,977.94 = 78,357.38 : x
2. Step 2: Convert to fraction form
   142,019.60/195,977.94 = 78,357.38/x
3. Step 3: Cross multiply
   142,019.60x = 195,977.94 × 78,357.38
4. Step 4: Simplify right side
   142,019.60x = 15,356,317,916.20
5. Step 5: Solve for x
   x = 15,356,317,916.20/142,019.60
6. Step 6: Final answer
   x = 108,128.16