Finding the Fourth Proportional to 128,736.50, 193,105.02 and 54,864.50

Step by Step Solution

1. Step 1: Write the proportion equation
   128,736.50 : 193,105.02 = 54,864.50 : x
2. Step 2: Convert to fraction form
   128,736.50/193,105.02 = 54,864.50/x
3. Step 3: Cross multiply
   128,736.50x = 193,105.02 × 54,864.50
4. Step 4: Simplify right side
   128,736.50x = 10,594,610,369.79
5. Step 5: Solve for x
   x = 10,594,610,369.79/128,736.50
6. Step 6: Final answer
   x = 82,296.87