Finding the Fourth Proportional to 142,127.07, 196,134.17 and 78,463.50

Step by Step Solution

1. Step 1: Write the proportion equation
   142,127.07 : 196,134.17 = 78,463.50 : x
2. Step 2: Convert to fraction form
   142,127.07/196,134.17 = 78,463.50/x
3. Step 3: Cross multiply
   142,127.07x = 196,134.17 × 78,463.50
4. Step 4: Simplify right side
   142,127.07x = 15,389,373,055.48
5. Step 5: Solve for x
   x = 15,389,373,055.48/142,127.07
6. Step 6: Final answer
   x = 108,278.97