Finding the Fourth Proportional to 389,958.63, 584,958.72 and 123,739.98

Step by Step Solution

1. Step 1: Write the proportion equation
   389,958.63 : 584,958.72 = 123,739.98 : x
2. Step 2: Convert to fraction form
   389,958.63/584,958.72 = 123,739.98/x
3. Step 3: Cross multiply
   389,958.63x = 584,958.72 × 123,739.98
4. Step 4: Simplify right side
   389,958.63x = 72,382,780,313.63
5. Step 5: Solve for x
   x = 72,382,780,313.63/389,958.63
6. Step 6: Final answer
   x = 185,616.56