Finding the Third Proportional to 666,698 and 1,059,099

Step by Step Solution

1. Step 1: Write the proportion equation
   666,698 : 1,059,099 = 1,059,099 : x
2. Step 2: Convert to fraction form
   666,698/1,059,099 = 1,059,099/x
3. Step 3: Cross multiply
   666,698x = 1,059,099 × 1,059,099
4. Step 4: Simplify right side
   666,698x = 1,121,690,691,801
5. Step 5: Solve for x
   x = 1,121,690,691,801/666,698
6. Step 6: Final answer
   x = 1,682,456.96