Finding the Third Proportional to 679,308 and 1,439,536

Step by Step Solution

1. Step 1: Write the proportion equation
   679,308 : 1,439,536 = 1,439,536 : x
2. Step 2: Convert to fraction form
   679,308/1,439,536 = 1,439,536/x
3. Step 3: Cross multiply
   679,308x = 1,439,536 × 1,439,536
4. Step 4: Simplify right side
   679,308x = 2,072,263,895,296
5. Step 5: Solve for x
   x = 2,072,263,895,296/679,308
6. Step 6: Final answer
   x = 3,050,551.29