Finding the Fourth Proportional to 142,028.94, 195,999.42 and 78,366.42

Step by Step Solution

1. Step 1: Write the proportion equation
   142,028.94 : 195,999.42 = 78,366.42 : x
2. Step 2: Convert to fraction form
   142,028.94/195,999.42 = 78,366.42/x
3. Step 3: Cross multiply
   142,028.94x = 195,999.42 × 78,366.42
4. Step 4: Simplify right side
   142,028.94x = 15,359,772,867.48
5. Step 5: Solve for x
   x = 15,359,772,867.48/142,028.94
6. Step 6: Final answer
   x = 108,145.37