Finding the Fourth Proportional to 389,912.73, 584,889.89 and 123,694.53

Step by Step Solution

1. Step 1: Write the proportion equation
   389,912.73 : 584,889.89 = 123,694.53 : x
2. Step 2: Convert to fraction form
   389,912.73/584,889.89 = 123,694.53/x
3. Step 3: Cross multiply
   389,912.73x = 584,889.89 × 123,694.53
4. Step 4: Simplify right side
   389,912.73x = 72,347,680,045.30
5. Step 5: Solve for x
   x = 72,347,680,045.30/389,912.73
6. Step 6: Final answer
   x = 185,548.39