Finding the Third Proportional to 666,718 and 1,059,128

Step by Step Solution

1. Step 1: Write the proportion equation
   666,718 : 1,059,128 = 1,059,128 : x
2. Step 2: Convert to fraction form
   666,718/1,059,128 = 1,059,128/x
3. Step 3: Cross multiply
   666,718x = 1,059,128 × 1,059,128
4. Step 4: Simplify right side
   666,718x = 1,121,752,120,384
5. Step 5: Solve for x
   x = 1,121,752,120,384/666,718
6. Step 6: Final answer
   x = 1,682,498.63