Finding the Fourth Proportional to 3,983.13, 5,496.72 and 2,215.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,983.13 : 5,496.72 = 2,215.15 : x
2. Step 2: Convert to fraction form
   3,983.13/5,496.72 = 2,215.15/x
3. Step 3: Cross multiply
   3,983.13x = 5,496.72 × 2,215.15
4. Step 4: Simplify right side
   3,983.13x = 12,176,059.31
5. Step 5: Solve for x
   x = 12,176,059.31/3,983.13
6. Step 6: Final answer
   x = 3,056.91