Finding the Third Proportional to 669,664 and 1,580,536

Step by Step Solution

1. Step 1: Write the proportion equation
   669,664 : 1,580,536 = 1,580,536 : x
2. Step 2: Convert to fraction form
   669,664/1,580,536 = 1,580,536/x
3. Step 3: Cross multiply
   669,664x = 1,580,536 × 1,580,536
4. Step 4: Simplify right side
   669,664x = 2,498,094,047,296
5. Step 5: Solve for x
   x = 2,498,094,047,296/669,664
6. Step 6: Final answer
   x = 3,730,369.33