Finding the Fourth Proportional to 404,786.52, 607,189.50 and 138,545.28

Step by Step Solution

1. Step 1: Write the proportion equation
   404,786.52 : 607,189.50 = 138,545.28 : x
2. Step 2: Convert to fraction form
   404,786.52/607,189.50 = 138,545.28/x
3. Step 3: Cross multiply
   404,786.52x = 607,189.50 × 138,545.28
4. Step 4: Simplify right side
   404,786.52x = 84,123,239,290.56
5. Step 5: Solve for x
   x = 84,123,239,290.56/404,786.52
6. Step 6: Final answer
   x = 207,821.25