Finding the Fourth Proportional to 440,789.82, 661,132.17 and 260,982.78

Step by Step Solution

1. Step 1: Write the proportion equation
   440,789.82 : 661,132.17 = 260,982.78 : x
2. Step 2: Convert to fraction form
   440,789.82/661,132.17 = 260,982.78/x
3. Step 3: Cross multiply
   440,789.82x = 661,132.17 × 260,982.78
4. Step 4: Simplify right side
   440,789.82x = 172,544,111,674.03
5. Step 5: Solve for x
   x = 172,544,111,674.03/440,789.82
6. Step 6: Final answer
   x = 391,443.05