Finding the Fourth Proportional to 389,628.30, 584,157.33 and 123,239.82

Step by Step Solution

1. Step 1: Write the proportion equation
   389,628.30 : 584,157.33 = 123,239.82 : x
2. Step 2: Convert to fraction form
   389,628.30/584,157.33 = 123,239.82/x
3. Step 3: Cross multiply
   389,628.30x = 584,157.33 × 123,239.82
4. Step 4: Simplify right side
   389,628.30x = 71,991,444,200.88
5. Step 5: Solve for x
   x = 71,991,444,200.88/389,628.30
6. Step 6: Final answer
   x = 184,769.55