Finding the Third Proportional to 552,430 and 862,220.75

Step by Step Solution

1. Step 1: Write the proportion equation
   552,430 : 862,220.75 = 862,220.75 : x
2. Step 2: Convert to fraction form
   552,430/862,220.75 = 862,220.75/x
3. Step 3: Cross multiply
   552,430x = 862,220.75 × 862,220.75
4. Step 4: Simplify right side
   552,430x = 743,424,621,730.56
5. Step 5: Solve for x
   x = 743,424,621,730.56/552,430
6. Step 6: Final answer
   x = 1,345,735.43