Finding the Third Proportional to 443.25 and 619.63

Step by Step Solution

1. Step 1: Write the proportion equation
   443.25 : 619.63 = 619.63 : x
2. Step 2: Convert to fraction form
   443.25/619.63 = 619.63/x
3. Step 3: Cross multiply
   443.25x = 619.63 × 619.63
4. Step 4: Simplify right side
   443.25x = 383,935.14
5. Step 5: Solve for x
   x = 383,935.14/443.25
6. Step 6: Final answer
   x = 866.18