Finding the Third Proportional to 1,223,815 and 1,720,358

Step by Step Solution

1. Step 1: Write the proportion equation
   1,223,815 : 1,720,358 = 1,720,358 : x
2. Step 2: Convert to fraction form
   1,223,815/1,720,358 = 1,720,358/x
3. Step 3: Cross multiply
   1,223,815x = 1,720,358 × 1,720,358
4. Step 4: Simplify right side
   1,223,815x = 2,959,631,648,164
5. Step 5: Solve for x
   x = 2,959,631,648,164/1,223,815
6. Step 6: Final answer
   x = 2,418,365.23