Finding the Third Proportional to 449.72 and 607.22

Step by Step Solution

1. Step 1: Write the proportion equation
   449.72 : 607.22 = 607.22 : x
2. Step 2: Convert to fraction form
   449.72/607.22 = 607.22/x
3. Step 3: Cross multiply
   449.72x = 607.22 × 607.22
4. Step 4: Simplify right side
   449.72x = 368,714.61
5. Step 5: Solve for x
   x = 368,714.61/449.72
6. Step 6: Final answer
   x = 819.88