Finding the Third Proportional to 371,045 and 813,105

Step by Step Solution

1. Step 1: Write the proportion equation
   371,045 : 813,105 = 813,105 : x
2. Step 2: Convert to fraction form
   371,045/813,105 = 813,105/x
3. Step 3: Cross multiply
   371,045x = 813,105 × 813,105
4. Step 4: Simplify right side
   371,045x = 661,139,741,025
5. Step 5: Solve for x
   x = 661,139,741,025/371,045
6. Step 6: Final answer
   x = 1,781,831.69