Finding the Third Proportional to 643,908 and 1,019,375

Step by Step Solution

1. Step 1: Write the proportion equation
   643,908 : 1,019,375 = 1,019,375 : x
2. Step 2: Convert to fraction form
   643,908/1,019,375 = 1,019,375/x
3. Step 3: Cross multiply
   643,908x = 1,019,375 × 1,019,375
4. Step 4: Simplify right side
   643,908x = 1,039,125,390,625
5. Step 5: Solve for x
   x = 1,039,125,390,625/643,908
6. Step 6: Final answer
   x = 1,613,779.28