Finding the Fourth Proportional to 142,604.09, 196,795.10 and 78,940.52

Step by Step Solution

1. Step 1: Write the proportion equation
   142,604.09 : 196,795.10 = 78,940.52 : x
2. Step 2: Convert to fraction form
   142,604.09/196,795.10 = 78,940.52/x
3. Step 3: Cross multiply
   142,604.09x = 196,795.10 × 78,940.52
4. Step 4: Simplify right side
   142,604.09x = 15,535,107,527.45
5. Step 5: Solve for x
   x = 15,535,107,527.45/142,604.09
6. Step 6: Final answer
   x = 108,938.72