Finding the Fourth Proportional to 128,626.43, 192,939.72 and 53,705.73

Step by Step Solution

1. Step 1: Write the proportion equation
   128,626.43 : 192,939.72 = 53,705.73 : x
2. Step 2: Convert to fraction form
   128,626.43/192,939.72 = 53,705.73/x
3. Step 3: Cross multiply
   128,626.43x = 192,939.72 × 53,705.73
4. Step 4: Simplify right side
   128,626.43x = 10,361,969,332.82
5. Step 5: Solve for x
   x = 10,361,969,332.82/128,626.43
6. Step 6: Final answer
   x = 80,558.63