Finding the Third Proportional to 621,272 and 1,358,860

Step by Step Solution

1. Step 1: Write the proportion equation
   621,272 : 1,358,860 = 1,358,860 : x
2. Step 2: Convert to fraction form
   621,272/1,358,860 = 1,358,860/x
3. Step 3: Cross multiply
   621,272x = 1,358,860 × 1,358,860
4. Step 4: Simplify right side
   621,272x = 1,846,500,499,600
5. Step 5: Solve for x
   x = 1,846,500,499,600/621,272
6. Step 6: Final answer
   x = 2,972,128.95