Finding the Fourth Proportional to 389,992.72, 585,076.56 and 123,761.92

Step by Step Solution

1. Step 1: Write the proportion equation
   389,992.72 : 585,076.56 = 123,761.92 : x
2. Step 2: Convert to fraction form
   389,992.72/585,076.56 = 123,761.92/x
3. Step 3: Cross multiply
   389,992.72x = 585,076.56 × 123,761.92
4. Step 4: Simplify right side
   389,992.72x = 72,410,198,412.60
5. Step 5: Solve for x
   x = 72,410,198,412.60/389,992.72
6. Step 6: Final answer
   x = 185,670.64