Finding the Fourth Proportional to 3,977.16, 5,488.20 and 2,208.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,977.16 : 5,488.20 = 2,208.72 : x
2. Step 2: Convert to fraction form
   3,977.16/5,488.20 = 2,208.72/x
3. Step 3: Cross multiply
   3,977.16x = 5,488.20 × 2,208.72
4. Step 4: Simplify right side
   3,977.16x = 12,121,897.10
5. Step 5: Solve for x
   x = 12,121,897.10/3,977.16
6. Step 6: Final answer
   x = 3,047.88