Finding the Fourth Proportional to 389,623.05, 584,452.80 and 123,404.40

Step by Step Solution

1. Step 1: Write the proportion equation
   389,623.05 : 584,452.80 = 123,404.40 : x
2. Step 2: Convert to fraction form
   389,623.05/584,452.80 = 123,404.40/x
3. Step 3: Cross multiply
   389,623.05x = 584,452.80 × 123,404.40
4. Step 4: Simplify right side
   389,623.05x = 72,124,047,112.32
5. Step 5: Solve for x
   x = 72,124,047,112.32/389,623.05
6. Step 6: Final answer
   x = 185,112.37