Finding the Fourth Proportional to 142,350.72, 196,436.16 and 78,684.36

Step by Step Solution

1. Step 1: Write the proportion equation
   142,350.72 : 196,436.16 = 78,684.36 : x
2. Step 2: Convert to fraction form
   142,350.72/196,436.16 = 78,684.36/x
3. Step 3: Cross multiply
   142,350.72x = 196,436.16 × 78,684.36
4. Step 4: Simplify right side
   142,350.72x = 15,456,453,530.46
5. Step 5: Solve for x
   x = 15,456,453,530.46/142,350.72
6. Step 6: Final answer
   x = 108,580.09