Finding the Third Proportional to 621,296 and 1,358,890

Step by Step Solution

1. Step 1: Write the proportion equation
   621,296 : 1,358,890 = 1,358,890 : x
2. Step 2: Convert to fraction form
   621,296/1,358,890 = 1,358,890/x
3. Step 3: Cross multiply
   621,296x = 1,358,890 × 1,358,890
4. Step 4: Simplify right side
   621,296x = 1,846,582,032,100
5. Step 5: Solve for x
   x = 1,846,582,032,100/621,296
6. Step 6: Final answer
   x = 2,972,145.37