Finding the Fourth Proportional to 3,681.42, 5,080.31 and 2,002.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,681.42 : 5,080.31 = 2,002.80 : x
2. Step 2: Convert to fraction form
   3,681.42/5,080.31 = 2,002.80/x
3. Step 3: Cross multiply
   3,681.42x = 5,080.31 × 2,002.80
4. Step 4: Simplify right side
   3,681.42x = 10,174,844.87
5. Step 5: Solve for x
   x = 10,174,844.87/3,681.42
6. Step 6: Final answer
   x = 2,763.84