Finding the Fourth Proportional to 3,680.96, 5,079.52 and 2,109.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,680.96 : 5,079.52 = 2,109.12 : x
2. Step 2: Convert to fraction form
   3,680.96/5,079.52 = 2,109.12/x
3. Step 3: Cross multiply
   3,680.96x = 5,079.52 × 2,109.12
4. Step 4: Simplify right side
   3,680.96x = 10,713,317.22
5. Step 5: Solve for x
   x = 10,713,317.22/3,680.96
6. Step 6: Final answer
   x = 2,910.47