Finding the Third Proportional to 424,978 and 915,530

Step by Step Solution

1. Step 1: Write the proportion equation
   424,978 : 915,530 = 915,530 : x
2. Step 2: Convert to fraction form
   424,978/915,530 = 915,530/x
3. Step 3: Cross multiply
   424,978x = 915,530 × 915,530
4. Step 4: Simplify right side
   424,978x = 838,195,180,900
5. Step 5: Solve for x
   x = 838,195,180,900/424,978
6. Step 6: Final answer
   x = 1,972,326.05