Finding the Fourth Proportional to 298,058, 411,111.72 and 196,051.28

Step by Step Solution

1. Step 1: Write the proportion equation
   298,058 : 411,111.72 = 196,051.28 : x
2. Step 2: Convert to fraction form
   298,058/411,111.72 = 196,051.28/x
3. Step 3: Cross multiply
   298,058x = 411,111.72 × 196,051.28
4. Step 4: Simplify right side
   298,058x = 80,598,978,929.00
5. Step 5: Solve for x
   x = 80,598,978,929.00/298,058
6. Step 6: Final answer
   x = 270,413.74