Finding the Third Proportional to 687,072 and 1,056,672

Step by Step Solution

1. Step 1: Write the proportion equation
   687,072 : 1,056,672 = 1,056,672 : x
2. Step 2: Convert to fraction form
   687,072/1,056,672 = 1,056,672/x
3. Step 3: Cross multiply
   687,072x = 1,056,672 × 1,056,672
4. Step 4: Simplify right side
   687,072x = 1,116,555,715,584
5. Step 5: Solve for x
   x = 1,116,555,715,584/687,072
6. Step 6: Final answer
   x = 1,625,092.73