Finding the Fourth Proportional to 406,765, 561,335.86 and 247,789

Step by Step Solution

1. Step 1: Write the proportion equation
   406,765 : 561,335.86 = 247,789 : x
2. Step 2: Convert to fraction form
   406,765/561,335.86 = 247,789/x
3. Step 3: Cross multiply
   406,765x = 561,335.86 × 247,789
4. Step 4: Simplify right side
   406,765x = 139,092,851,413.54
5. Step 5: Solve for x
   x = 139,092,851,413.54/406,765
6. Step 6: Final answer
   x = 341,948.92