Finding the Third Proportional to 705,678 and 1,665,591

Step by Step Solution

1. Step 1: Write the proportion equation
   705,678 : 1,665,591 = 1,665,591 : x
2. Step 2: Convert to fraction form
   705,678/1,665,591 = 1,665,591/x
3. Step 3: Cross multiply
   705,678x = 1,665,591 × 1,665,591
4. Step 4: Simplify right side
   705,678x = 2,774,193,379,281
5. Step 5: Solve for x
   x = 2,774,193,379,281/705,678
6. Step 6: Final answer
   x = 3,931,245.38