Finding the Fourth Proportional to 142,143.51, 196,156.72 and 78,481.76

Step by Step Solution

1. Step 1: Write the proportion equation
   142,143.51 : 196,156.72 = 78,481.76 : x
2. Step 2: Convert to fraction form
   142,143.51/196,156.72 = 78,481.76/x
3. Step 3: Cross multiply
   142,143.51x = 196,156.72 × 78,481.76
4. Step 4: Simplify right side
   142,143.51x = 15,394,724,621.43
5. Step 5: Solve for x
   x = 15,394,724,621.43/142,143.51
6. Step 6: Final answer
   x = 108,304.10