Finding the Third Proportional to 656,860 and 1,421,672

Step by Step Solution

1. Step 1: Write the proportion equation
   656,860 : 1,421,672 = 1,421,672 : x
2. Step 2: Convert to fraction form
   656,860/1,421,672 = 1,421,672/x
3. Step 3: Cross multiply
   656,860x = 1,421,672 × 1,421,672
4. Step 4: Simplify right side
   656,860x = 2,021,151,275,584
5. Step 5: Solve for x
   x = 2,021,151,275,584/656,860
6. Step 6: Final answer
   x = 3,076,989.43