Finding the Fourth Proportional to 3,680.82, 5,079.66 and 2,109.22

Step by Step Solution

1. Step 1: Write the proportion equation
   3,680.82 : 5,079.66 = 2,109.22 : x
2. Step 2: Convert to fraction form
   3,680.82/5,079.66 = 2,109.22/x
3. Step 3: Cross multiply
   3,680.82x = 5,079.66 × 2,109.22
4. Step 4: Simplify right side
   3,680.82x = 10,714,120.47
5. Step 5: Solve for x
   x = 10,714,120.47/3,680.82
6. Step 6: Final answer
   x = 2,910.80