Finding the Fourth Proportional to 142,087.51, 196,079.82 and 78,425.31

Step by Step Solution

1. Step 1: Write the proportion equation
   142,087.51 : 196,079.82 = 78,425.31 : x
2. Step 2: Convert to fraction form
   142,087.51/196,079.82 = 78,425.31/x
3. Step 3: Cross multiply
   142,087.51x = 196,079.82 × 78,425.31
4. Step 4: Simplify right side
   142,087.51x = 15,377,620,668.24
5. Step 5: Solve for x
   x = 15,377,620,668.24/142,087.51
6. Step 6: Final answer
   x = 108,226.41