Finding the Fourth Proportional to 724,456.10, 1,085,906.55 and 275,003.30

Step by Step Solution

1. Step 1: Write the proportion equation
   724,456.10 : 1,085,906.55 = 275,003.30 : x
2. Step 2: Convert to fraction form
   724,456.10/1,085,906.55 = 275,003.30/x
3. Step 3: Cross multiply
   724,456.10x = 1,085,906.55 × 275,003.30
4. Step 4: Simplify right side
   724,456.10x = 298,627,884,741.62
5. Step 5: Solve for x
   x = 298,627,884,741.62/724,456.10
6. Step 6: Final answer
   x = 412,209.77