Finding the Fourth Proportional to 142,121.39, 196,126.25 and 78,457.82

Step by Step Solution

1. Step 1: Write the proportion equation
   142,121.39 : 196,126.25 = 78,457.82 : x
2. Step 2: Convert to fraction form
   142,121.39/196,126.25 = 78,457.82/x
3. Step 3: Cross multiply
   142,121.39x = 196,126.25 × 78,457.82
4. Step 4: Simplify right side
   142,121.39x = 15,387,636,646.85
5. Step 5: Solve for x
   x = 15,387,636,646.85/142,121.39
6. Step 6: Final answer
   x = 108,271.09