Finding the Fourth Proportional to 389,635.38, 584,541.63 and 123,412.50

Step by Step Solution

1. Step 1: Write the proportion equation
   389,635.38 : 584,541.63 = 123,412.50 : x
2. Step 2: Convert to fraction form
   389,635.38/584,541.63 = 123,412.50/x
3. Step 3: Cross multiply
   389,635.38x = 584,541.63 × 123,412.50
4. Step 4: Simplify right side
   389,635.38x = 72,139,743,912.38
5. Step 5: Solve for x
   x = 72,139,743,912.38/389,635.38
6. Step 6: Final answer
   x = 185,146.80