Finding the Third Proportional to 689,616 and 1,070,298

Step by Step Solution

1. Step 1: Write the proportion equation
   689,616 : 1,070,298 = 1,070,298 : x
2. Step 2: Convert to fraction form
   689,616/1,070,298 = 1,070,298/x
3. Step 3: Cross multiply
   689,616x = 1,070,298 × 1,070,298
4. Step 4: Simplify right side
   689,616x = 1,145,537,808,804
5. Step 5: Solve for x
   x = 1,145,537,808,804/689,616
6. Step 6: Final answer
   x = 1,661,124.17