Finding the Third Proportional to 640,916 and 1,005,368

Step by Step Solution

1. Step 1: Write the proportion equation
   640,916 : 1,005,368 = 1,005,368 : x
2. Step 2: Convert to fraction form
   640,916/1,005,368 = 1,005,368/x
3. Step 3: Cross multiply
   640,916x = 1,005,368 × 1,005,368
4. Step 4: Simplify right side
   640,916x = 1,010,764,815,424
5. Step 5: Solve for x
   x = 1,010,764,815,424/640,916
6. Step 6: Final answer
   x = 1,577,062.85