Finding the Fourth Proportional to 3,984.02, 5,498.01 and 2,215.70

Step by Step Solution

1. Step 1: Write the proportion equation
   3,984.02 : 5,498.01 = 2,215.70 : x
2. Step 2: Convert to fraction form
   3,984.02/5,498.01 = 2,215.70/x
3. Step 3: Cross multiply
   3,984.02x = 5,498.01 × 2,215.70
4. Step 4: Simplify right side
   3,984.02x = 12,181,940.76
5. Step 5: Solve for x
   x = 12,181,940.76/3,984.02
6. Step 6: Final answer
   x = 3,057.70