Finding the Fourth Proportional to 360,019.72, 496,857.54 and 209,107

Step by Step Solution

1. Step 1: Write the proportion equation
   360,019.72 : 496,857.54 = 209,107 : x
2. Step 2: Convert to fraction form
   360,019.72/496,857.54 = 209,107/x
3. Step 3: Cross multiply
   360,019.72x = 496,857.54 × 209,107
4. Step 4: Simplify right side
   360,019.72x = 103,896,389,616.78
5. Step 5: Solve for x
   x = 103,896,389,616.78/360,019.72
6. Step 6: Final answer
   x = 288,585.27