Finding the Third Proportional to 561,486 and 1,217,564

Step by Step Solution

1. Step 1: Write the proportion equation
   561,486 : 1,217,564 = 1,217,564 : x
2. Step 2: Convert to fraction form
   561,486/1,217,564 = 1,217,564/x
3. Step 3: Cross multiply
   561,486x = 1,217,564 × 1,217,564
4. Step 4: Simplify right side
   561,486x = 1,482,462,094,096
5. Step 5: Solve for x
   x = 1,482,462,094,096/561,486
6. Step 6: Final answer
   x = 2,640,247.65