Finding the Third Proportional to 1,623.16 and 3,555.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,623.16 : 3,555.30 = 3,555.30 : x
2. Step 2: Convert to fraction form
   1,623.16/3,555.30 = 3,555.30/x
3. Step 3: Cross multiply
   1,623.16x = 3,555.30 × 3,555.30
4. Step 4: Simplify right side
   1,623.16x = 12,640,149.76
5. Step 5: Solve for x
   x = 12,640,149.76/1,623.16
6. Step 6: Final answer
   x = 7,787.35