Finding the Third Proportional to 640,956 and 1,005,426

Step by Step Solution

1. Step 1: Write the proportion equation
   640,956 : 1,005,426 = 1,005,426 : x
2. Step 2: Convert to fraction form
   640,956/1,005,426 = 1,005,426/x
3. Step 3: Cross multiply
   640,956x = 1,005,426 × 1,005,426
4. Step 4: Simplify right side
   640,956x = 1,010,881,441,476
5. Step 5: Solve for x
   x = 1,010,881,441,476/640,956
6. Step 6: Final answer
   x = 1,577,146.39