Finding the Fourth Proportional to 142,260.57, 196,323.57 and 78,602.49

Step by Step Solution

1. Step 1: Write the proportion equation
   142,260.57 : 196,323.57 = 78,602.49 : x
2. Step 2: Convert to fraction form
   142,260.57/196,323.57 = 78,602.49/x
3. Step 3: Cross multiply
   142,260.57x = 196,323.57 × 78,602.49
4. Step 4: Simplify right side
   142,260.57x = 15,431,521,447.69
5. Step 5: Solve for x
   x = 15,431,521,447.69/142,260.57
6. Step 6: Final answer
   x = 108,473.64