Finding the Third Proportional to 395,403 and 612,767.25

Step by Step Solution

1. Step 1: Write the proportion equation
   395,403 : 612,767.25 = 612,767.25 : x
2. Step 2: Convert to fraction form
   395,403/612,767.25 = 612,767.25/x
3. Step 3: Cross multiply
   395,403x = 612,767.25 × 612,767.25
4. Step 4: Simplify right side
   395,403x = 375,483,702,672.56
5. Step 5: Solve for x
   x = 375,483,702,672.56/395,403
6. Step 6: Final answer
   x = 949,622.80