Finding the Third Proportional to 646,266 and 1,380,500

Step by Step Solution

1. Step 1: Write the proportion equation
   646,266 : 1,380,500 = 1,380,500 : x
2. Step 2: Convert to fraction form
   646,266/1,380,500 = 1,380,500/x
3. Step 3: Cross multiply
   646,266x = 1,380,500 × 1,380,500
4. Step 4: Simplify right side
   646,266x = 1,905,780,250,000
5. Step 5: Solve for x
   x = 1,905,780,250,000/646,266
6. Step 6: Final answer
   x = 2,948,909.97