Finding the Fourth Proportional to 3,681.63, 5,080.50 and 2,109.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,681.63 : 5,080.50 = 2,109.42 : x
2. Step 2: Convert to fraction form
   3,681.63/5,080.50 = 2,109.42/x
3. Step 3: Cross multiply
   3,681.63x = 5,080.50 × 2,109.42
4. Step 4: Simplify right side
   3,681.63x = 10,716,908.31
5. Step 5: Solve for x
   x = 10,716,908.31/3,681.63
6. Step 6: Final answer
   x = 2,910.91