Finding the Fourth Proportional to 3,681.16, 5,080.05 and 2,109.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,681.16 : 5,080.05 = 2,109.25 : x
2. Step 2: Convert to fraction form
   3,681.16/5,080.05 = 2,109.25/x
3. Step 3: Cross multiply
   3,681.16x = 5,080.05 × 2,109.25
4. Step 4: Simplify right side
   3,681.16x = 10,715,084.92
5. Step 5: Solve for x
   x = 10,715,084.92/3,681.16
6. Step 6: Final answer
   x = 2,910.79