Finding the Third Proportional to 662,643 and 999,488.25

Step by Step Solution

1. Step 1: Write the proportion equation
   662,643 : 999,488.25 = 999,488.25 : x
2. Step 2: Convert to fraction form
   662,643/999,488.25 = 999,488.25/x
3. Step 3: Cross multiply
   662,643x = 999,488.25 × 999,488.25
4. Step 4: Simplify right side
   662,643x = 998,976,761,888.06
5. Step 5: Solve for x
   x = 998,976,761,888.06/662,643
6. Step 6: Final answer
   x = 1,507,564.05