Finding the Third Proportional to 1,621.69 and 3,650.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,621.69 : 3,650.91 = 3,650.91 : x
2. Step 2: Convert to fraction form
   1,621.69/3,650.91 = 3,650.91/x
3. Step 3: Cross multiply
   1,621.69x = 3,650.91 × 3,650.91
4. Step 4: Simplify right side
   1,621.69x = 13,329,116.45
5. Step 5: Solve for x
   x = 13,329,116.45/1,621.69
6. Step 6: Final answer
   x = 8,219.29