Finding the Fourth Proportional to 388,717.47, 581,759.55 and 239,052.69

Step by Step Solution

1. Step 1: Write the proportion equation
   388,717.47 : 581,759.55 = 239,052.69 : x
2. Step 2: Convert to fraction form
   388,717.47/581,759.55 = 239,052.69/x
3. Step 3: Cross multiply
   388,717.47x = 581,759.55 × 239,052.69
4. Step 4: Simplify right side
   388,717.47x = 139,071,185,360.69
5. Step 5: Solve for x
   x = 139,071,185,360.69/388,717.47
6. Step 6: Final answer
   x = 357,769.32