Finding the Fourth Proportional to 142,186.69, 196,216.72 and 78,524.34

Step by Step Solution

1. Step 1: Write the proportion equation
   142,186.69 : 196,216.72 = 78,524.34 : x
2. Step 2: Convert to fraction form
   142,186.69/196,216.72 = 78,524.34/x
3. Step 3: Cross multiply
   142,186.69x = 196,216.72 × 78,524.34
4. Step 4: Simplify right side
   142,186.69x = 15,407,788,434.96
5. Step 5: Solve for x
   x = 15,407,788,434.96/142,186.69
6. Step 6: Final answer
   x = 108,363.09