Finding the Fourth Proportional to 2,980.86, 4,472.81 and 1,227.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,980.86 : 4,472.81 = 1,227.21 : x
2. Step 2: Convert to fraction form
   2,980.86/4,472.81 = 1,227.21/x
3. Step 3: Cross multiply
   2,980.86x = 4,472.81 × 1,227.21
4. Step 4: Simplify right side
   2,980.86x = 5,489,077.16
5. Step 5: Solve for x
   x = 5,489,077.16/2,980.86
6. Step 6: Final answer
   x = 1,841.44