Finding the Fourth Proportional to 389,884.56, 584,847.72 and 123,665.28

Step by Step Solution

1. Step 1: Write the proportion equation
   389,884.56 : 584,847.72 = 123,665.28 : x
2. Step 2: Convert to fraction form
   389,884.56/584,847.72 = 123,665.28/x
3. Step 3: Cross multiply
   389,884.56x = 584,847.72 × 123,665.28
4. Step 4: Simplify right side
   389,884.56x = 72,325,357,051.16
5. Step 5: Solve for x
   x = 72,325,357,051.16/389,884.56
6. Step 6: Final answer
   x = 185,504.54