Finding the Fourth Proportional to 142,492.69, 196,629.07 and 78,829.12

Step by Step Solution

1. Step 1: Write the proportion equation
   142,492.69 : 196,629.07 = 78,829.12 : x
2. Step 2: Convert to fraction form
   142,492.69/196,629.07 = 78,829.12/x
3. Step 3: Cross multiply
   142,492.69x = 196,629.07 × 78,829.12
4. Step 4: Simplify right side
   142,492.69x = 15,500,095,374.30
5. Step 5: Solve for x
   x = 15,500,095,374.30/142,492.69
6. Step 6: Final answer
   x = 108,778.18