Finding the Third Proportional to 820,274 and 1,284,172

Step by Step Solution

1. Step 1: Write the proportion equation
   820,274 : 1,284,172 = 1,284,172 : x
2. Step 2: Convert to fraction form
   820,274/1,284,172 = 1,284,172/x
3. Step 3: Cross multiply
   820,274x = 1,284,172 × 1,284,172
4. Step 4: Simplify right side
   820,274x = 1,649,097,725,584
5. Step 5: Solve for x
   x = 1,649,097,725,584/820,274
6. Step 6: Final answer
   x = 2,010,423.01