Finding the Fourth Proportional to 142,067.63, 196,047.60 and 78,404.60

Step by Step Solution

1. Step 1: Write the proportion equation
   142,067.63 : 196,047.60 = 78,404.60 : x
2. Step 2: Convert to fraction form
   142,067.63/196,047.60 = 78,404.60/x
3. Step 3: Cross multiply
   142,067.63x = 196,047.60 × 78,404.60
4. Step 4: Simplify right side
   142,067.63x = 15,371,033,658.96
5. Step 5: Solve for x
   x = 15,371,033,658.96/142,067.63
6. Step 6: Final answer
   x = 108,195.19