Finding the Fourth Proportional to 3,609.34, 4,980.57 and 2,015.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,609.34 : 4,980.57 = 2,015.86 : x
2. Step 2: Convert to fraction form
   3,609.34/4,980.57 = 2,015.86/x
3. Step 3: Cross multiply
   3,609.34x = 4,980.57 × 2,015.86
4. Step 4: Simplify right side
   3,609.34x = 10,040,131.84
5. Step 5: Solve for x
   x = 10,040,131.84/3,609.34
6. Step 6: Final answer
   x = 2,781.71