Finding the Third Proportional to 1,620.56 and 3,551.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,620.56 : 3,551.63 = 3,551.63 : x
2. Step 2: Convert to fraction form
   1,620.56/3,551.63 = 3,551.63/x
3. Step 3: Cross multiply
   1,620.56x = 3,551.63 × 3,551.63
4. Step 4: Simplify right side
   1,620.56x = 12,614,040.14
5. Step 5: Solve for x
   x = 12,614,040.14/1,620.56
6. Step 6: Final answer
   x = 7,783.74