Finding the Third Proportional to 645,540 and 1,378,932

Step by Step Solution

1. Step 1: Write the proportion equation
   645,540 : 1,378,932 = 1,378,932 : x
2. Step 2: Convert to fraction form
   645,540/1,378,932 = 1,378,932/x
3. Step 3: Cross multiply
   645,540x = 1,378,932 × 1,378,932
4. Step 4: Simplify right side
   645,540x = 1,901,453,460,624
5. Step 5: Solve for x
   x = 1,901,453,460,624/645,540
6. Step 6: Final answer
   x = 2,945,523.84