Finding the Fourth Proportional to 285,552.48, 428,329.71 and 72,320.34

Step by Step Solution

1. Step 1: Write the proportion equation
   285,552.48 : 428,329.71 = 72,320.34 : x
2. Step 2: Convert to fraction form
   285,552.48/428,329.71 = 72,320.34/x
3. Step 3: Cross multiply
   285,552.48x = 428,329.71 × 72,320.34
4. Step 4: Simplify right side
   285,552.48x = 30,976,950,259.30
5. Step 5: Solve for x
   x = 30,976,950,259.30/285,552.48
6. Step 6: Final answer
   x = 108,480.76