Finding the Fourth Proportional to 3,681.33, 5,080.35 and 2,109.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,681.33 : 5,080.35 = 2,109.72 : x
2. Step 2: Convert to fraction form
   3,681.33/5,080.35 = 2,109.72/x
3. Step 3: Cross multiply
   3,681.33x = 5,080.35 × 2,109.72
4. Step 4: Simplify right side
   3,681.33x = 10,718,116.00
5. Step 5: Solve for x
   x = 10,718,116.00/3,681.33
6. Step 6: Final answer
   x = 2,911.48