Finding the Third Proportional to 287,020 and 625,710

Step by Step Solution

1. Step 1: Write the proportion equation
   287,020 : 625,710 = 625,710 : x
2. Step 2: Convert to fraction form
   287,020/625,710 = 625,710/x
3. Step 3: Cross multiply
   287,020x = 625,710 × 625,710
4. Step 4: Simplify right side
   287,020x = 391,513,004,100
5. Step 5: Solve for x
   x = 391,513,004,100/287,020
6. Step 6: Final answer
   x = 1,364,061.75