Finding the Third Proportional to 691,072 and 1,066,128

Step by Step Solution

1. Step 1: Write the proportion equation
   691,072 : 1,066,128 = 1,066,128 : x
2. Step 2: Convert to fraction form
   691,072/1,066,128 = 1,066,128/x
3. Step 3: Cross multiply
   691,072x = 1,066,128 × 1,066,128
4. Step 4: Simplify right side
   691,072x = 1,136,628,912,384
5. Step 5: Solve for x
   x = 1,136,628,912,384/691,072
6. Step 6: Final answer
   x = 1,644,732.98