Finding the Third Proportional to 646,288 and 1,375,520

Step by Step Solution

1. Step 1: Write the proportion equation
   646,288 : 1,375,520 = 1,375,520 : x
2. Step 2: Convert to fraction form
   646,288/1,375,520 = 1,375,520/x
3. Step 3: Cross multiply
   646,288x = 1,375,520 × 1,375,520
4. Step 4: Simplify right side
   646,288x = 1,892,055,270,400
5. Step 5: Solve for x
   x = 1,892,055,270,400/646,288
6. Step 6: Final answer
   x = 2,927,572.96