Finding the Fourth Proportional to 728,100.73, 1,004,783.69 and 405,831.30

Step by Step Solution

1. Step 1: Write the proportion equation
   728,100.73 : 1,004,783.69 = 405,831.30 : x
2. Step 2: Convert to fraction form
   728,100.73/1,004,783.69 = 405,831.30/x
3. Step 3: Cross multiply
   728,100.73x = 1,004,783.69 × 405,831.30
4. Step 4: Simplify right side
   728,100.73x = 407,772,671,131.50
5. Step 5: Solve for x
   x = 407,772,671,131.50/728,100.73
6. Step 6: Final answer
   x = 560,049.80