Finding the Third Proportional to 689,411 and 1,029,945

Step by Step Solution

1. Step 1: Write the proportion equation
   689,411 : 1,029,945 = 1,029,945 : x
2. Step 2: Convert to fraction form
   689,411/1,029,945 = 1,029,945/x
3. Step 3: Cross multiply
   689,411x = 1,029,945 × 1,029,945
4. Step 4: Simplify right side
   689,411x = 1,060,786,703,025
5. Step 5: Solve for x
   x = 1,060,786,703,025/689,411
6. Step 6: Final answer
   x = 1,538,685.49