Finding the Fourth Proportional to 3,638.98, 5,018.72 and 3,080.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,638.98 : 5,018.72 = 3,080.69 : x
2. Step 2: Convert to fraction form
   3,638.98/5,018.72 = 3,080.69/x
3. Step 3: Cross multiply
   3,638.98x = 5,018.72 × 3,080.69
4. Step 4: Simplify right side
   3,638.98x = 15,461,120.52
5. Step 5: Solve for x
   x = 15,461,120.52/3,638.98
6. Step 6: Final answer
   x = 4,248.75