Finding the Third Proportional to 2,081.20 and 4,458.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,081.20 : 4,458.56 = 4,458.56 : x
2. Step 2: Convert to fraction form
   2,081.20/4,458.56 = 4,458.56/x
3. Step 3: Cross multiply
   2,081.20x = 4,458.56 × 4,458.56
4. Step 4: Simplify right side
   2,081.20x = 19,878,779.57
5. Step 5: Solve for x
   x = 19,878,779.57/2,081.20
6. Step 6: Final answer
   x = 9,551.58