Finding the Fourth Proportional to 142,020.06, 195,991.79 and 78,361.96

Step by Step Solution

1. Step 1: Write the proportion equation
   142,020.06 : 195,991.79 = 78,361.96 : x
2. Step 2: Convert to fraction form
   142,020.06/195,991.79 = 78,361.96/x
3. Step 3: Cross multiply
   142,020.06x = 195,991.79 × 78,361.96
4. Step 4: Simplify right side
   142,020.06x = 15,358,300,808.31
5. Step 5: Solve for x
   x = 15,358,300,808.31/142,020.06
6. Step 6: Final answer
   x = 108,141.77