Finding the Fourth Proportional to 142,249.20, 196,302.42 and 78,582.84

Step by Step Solution

1. Step 1: Write the proportion equation
   142,249.20 : 196,302.42 = 78,582.84 : x
2. Step 2: Convert to fraction form
   142,249.20/196,302.42 = 78,582.84/x
3. Step 3: Cross multiply
   142,249.20x = 196,302.42 × 78,582.84
4. Step 4: Simplify right side
   142,249.20x = 15,426,001,662.47
5. Step 5: Solve for x
   x = 15,426,001,662.47/142,249.20
6. Step 6: Final answer
   x = 108,443.50