Finding the Third Proportional to 621,258 and 1,358,830

Step by Step Solution

1. Step 1: Write the proportion equation
   621,258 : 1,358,830 = 1,358,830 : x
2. Step 2: Convert to fraction form
   621,258/1,358,830 = 1,358,830/x
3. Step 3: Cross multiply
   621,258x = 1,358,830 × 1,358,830
4. Step 4: Simplify right side
   621,258x = 1,846,418,968,900
5. Step 5: Solve for x
   x = 1,846,418,968,900/621,258
6. Step 6: Final answer
   x = 2,972,064.70