Finding the Third Proportional to 321,756 and 748,068

Step by Step Solution

1. Step 1: Write the proportion equation
   321,756 : 748,068 = 748,068 : x
2. Step 2: Convert to fraction form
   321,756/748,068 = 748,068/x
3. Step 3: Cross multiply
   321,756x = 748,068 × 748,068
4. Step 4: Simplify right side
   321,756x = 559,605,732,624
5. Step 5: Solve for x
   x = 559,605,732,624/321,756
6. Step 6: Final answer
   x = 1,739,223.92