Finding the Fourth Proportional to 3,681.28, 5,079.88 and 2,109.04

Step by Step Solution

1. Step 1: Write the proportion equation
   3,681.28 : 5,079.88 = 2,109.04 : x
2. Step 2: Convert to fraction form
   3,681.28/5,079.88 = 2,109.04/x
3. Step 3: Cross multiply
   3,681.28x = 5,079.88 × 2,109.04
4. Step 4: Simplify right side
   3,681.28x = 10,713,670.12
5. Step 5: Solve for x
   x = 10,713,670.12/3,681.28
6. Step 6: Final answer
   x = 2,910.31