Finding the Fourth Proportional to 142,186.16, 196,216.82 and 78,523.40

Step by Step Solution

1. Step 1: Write the proportion equation
   142,186.16 : 196,216.82 = 78,523.40 : x
2. Step 2: Convert to fraction form
   142,186.16/196,216.82 = 78,523.40/x
3. Step 3: Cross multiply
   142,186.16x = 196,216.82 × 78,523.40
4. Step 4: Simplify right side
   142,186.16x = 15,407,610,469.89
5. Step 5: Solve for x
   x = 15,407,610,469.89/142,186.16
6. Step 6: Final answer
   x = 108,362.24