Finding the Third Proportional to 812,838 and 1,207,512

Step by Step Solution

1. Step 1: Write the proportion equation
   812,838 : 1,207,512 = 1,207,512 : x
2. Step 2: Convert to fraction form
   812,838/1,207,512 = 1,207,512/x
3. Step 3: Cross multiply
   812,838x = 1,207,512 × 1,207,512
4. Step 4: Simplify right side
   812,838x = 1,458,085,230,144
5. Step 5: Solve for x
   x = 1,458,085,230,144/812,838
6. Step 6: Final answer
   x = 1,793,820.21