Finding the Fourth Proportional to 389,754.38, 584,647.83 and 123,509

Step by Step Solution

1. Step 1: Write the proportion equation
   389,754.38 : 584,647.83 = 123,509 : x
2. Step 2: Convert to fraction form
   389,754.38/584,647.83 = 123,509/x
3. Step 3: Cross multiply
   389,754.38x = 584,647.83 × 123,509
4. Step 4: Simplify right side
   389,754.38x = 72,209,268,835.47
5. Step 5: Solve for x
   x = 72,209,268,835.47/389,754.38
6. Step 6: Final answer
   x = 185,268.65