Finding the Third Proportional to 424,828.50 and 683,715

Step by Step Solution

1. Step 1: Write the proportion equation
   424,828.50 : 683,715 = 683,715 : x
2. Step 2: Convert to fraction form
   424,828.50/683,715 = 683,715/x
3. Step 3: Cross multiply
   424,828.50x = 683,715 × 683,715
4. Step 4: Simplify right side
   424,828.50x = 467,466,201,225
5. Step 5: Solve for x
   x = 467,466,201,225/424,828.50
6. Step 6: Final answer
   x = 1,100,364.50