Finding the Fourth Proportional to 527,665.72, 791,487.48 and 128,308.56

Step by Step Solution

1. Step 1: Write the proportion equation
   527,665.72 : 791,487.48 = 128,308.56 : x
2. Step 2: Convert to fraction form
   527,665.72/791,487.48 = 128,308.56/x
3. Step 3: Cross multiply
   527,665.72x = 791,487.48 × 128,308.56
4. Step 4: Simplify right side
   527,665.72x = 101,554,618,816.83
5. Step 5: Solve for x
   x = 101,554,618,816.83/527,665.72
6. Step 6: Final answer
   x = 192,460.14