Finding the Fourth Proportional to 3,977.12, 5,488.72 and 2,209.02

Step by Step Solution

1. Step 1: Write the proportion equation
   3,977.12 : 5,488.72 = 2,209.02 : x
2. Step 2: Convert to fraction form
   3,977.12/5,488.72 = 2,209.02/x
3. Step 3: Cross multiply
   3,977.12x = 5,488.72 × 2,209.02
4. Step 4: Simplify right side
   3,977.12x = 12,124,692.25
5. Step 5: Solve for x
   x = 12,124,692.25/3,977.12
6. Step 6: Final answer
   x = 3,048.61