Finding the Fourth Proportional to 142,496.80, 196,644.72 and 78,833.24

Step by Step Solution

1. Step 1: Write the proportion equation
   142,496.80 : 196,644.72 = 78,833.24 : x
2. Step 2: Convert to fraction form
   142,496.80/196,644.72 = 78,833.24/x
3. Step 3: Cross multiply
   142,496.80x = 196,644.72 × 78,833.24
4. Step 4: Simplify right side
   142,496.80x = 15,502,140,406.49
5. Step 5: Solve for x
   x = 15,502,140,406.49/142,496.80
6. Step 6: Final answer
   x = 108,789.39