Finding the Third Proportional to 1,620.75 and 3,556.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,620.75 : 3,556.69 = 3,556.69 : x
2. Step 2: Convert to fraction form
   1,620.75/3,556.69 = 3,556.69/x
3. Step 3: Cross multiply
   1,620.75x = 3,556.69 × 3,556.69
4. Step 4: Simplify right side
   1,620.75x = 12,650,025.97
5. Step 5: Solve for x
   x = 12,650,025.97/1,620.75
6. Step 6: Final answer
   x = 7,805.04