Finding the Fourth Proportional to 3,980.94, 5,496.15 and 2,565.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,980.94 : 5,496.15 = 2,565.12 : x
2. Step 2: Convert to fraction form
   3,980.94/5,496.15 = 2,565.12/x
3. Step 3: Cross multiply
   3,980.94x = 5,496.15 × 2,565.12
4. Step 4: Simplify right side
   3,980.94x = 14,098,298.03
5. Step 5: Solve for x
   x = 14,098,298.03/3,980.94
6. Step 6: Final answer
   x = 3,541.45