Finding the Third Proportional to 689,430 and 1,070,233

Step by Step Solution

1. Step 1: Write the proportion equation
   689,430 : 1,070,233 = 1,070,233 : x
2. Step 2: Convert to fraction form
   689,430/1,070,233 = 1,070,233/x
3. Step 3: Cross multiply
   689,430x = 1,070,233 × 1,070,233
4. Step 4: Simplify right side
   689,430x = 1,145,398,674,289
5. Step 5: Solve for x
   x = 1,145,398,674,289/689,430
6. Step 6: Final answer
   x = 1,661,370.52