Finding the Third Proportional to 709,688 and 1,128,642

Step by Step Solution

1. Step 1: Write the proportion equation
   709,688 : 1,128,642 = 1,128,642 : x
2. Step 2: Convert to fraction form
   709,688/1,128,642 = 1,128,642/x
3. Step 3: Cross multiply
   709,688x = 1,128,642 × 1,128,642
4. Step 4: Simplify right side
   709,688x = 1,273,832,764,164
5. Step 5: Solve for x
   x = 1,273,832,764,164/709,688
6. Step 6: Final answer
   x = 1,794,919.41