Finding the Fourth Proportional to 245,563.05, 338,413.91 and 215,150.25

Step by Step Solution

1. Step 1: Write the proportion equation
   245,563.05 : 338,413.91 = 215,150.25 : x
2. Step 2: Convert to fraction form
   245,563.05/338,413.91 = 215,150.25/x
3. Step 3: Cross multiply
   245,563.05x = 338,413.91 × 215,150.25
4. Step 4: Simplify right side
   245,563.05x = 72,809,836,264.23
5. Step 5: Solve for x
   x = 72,809,836,264.23/245,563.05
6. Step 6: Final answer
   x = 296,501.60