Finding the Fourth Proportional to 142,102.86, 196,103.57 and 78,440.69

Step by Step Solution

1. Step 1: Write the proportion equation
   142,102.86 : 196,103.57 = 78,440.69 : x
2. Step 2: Convert to fraction form
   142,102.86/196,103.57 = 78,440.69/x
3. Step 3: Cross multiply
   142,102.86x = 196,103.57 × 78,440.69
4. Step 4: Simplify right side
   142,102.86x = 15,382,499,342.26
5. Step 5: Solve for x
   x = 15,382,499,342.26/142,102.86
6. Step 6: Final answer
   x = 108,249.05