Finding the Fourth Proportional to 3,109.80, 4,641.89 and 2,721

Step by Step Solution

1. Step 1: Write the proportion equation
   3,109.80 : 4,641.89 = 2,721 : x
2. Step 2: Convert to fraction form
   3,109.80/4,641.89 = 2,721/x
3. Step 3: Cross multiply
   3,109.80x = 4,641.89 × 2,721
4. Step 4: Simplify right side
   3,109.80x = 12,630,582.69
5. Step 5: Solve for x
   x = 12,630,582.69/3,109.80
6. Step 6: Final answer
   x = 4,061.54