Finding the Third Proportional to 603,418.50 and 1,256,452.50

Step by Step Solution

1. Step 1: Write the proportion equation
   603,418.50 : 1,256,452.50 = 1,256,452.50 : x
2. Step 2: Convert to fraction form
   603,418.50/1,256,452.50 = 1,256,452.50/x
3. Step 3: Cross multiply
   603,418.50x = 1,256,452.50 × 1,256,452.50
4. Step 4: Simplify right side
   603,418.50x = 1,578,672,884,756.25
5. Step 5: Solve for x
   x = 1,578,672,884,756.25/603,418.50
6. Step 6: Final answer
   x = 2,616,215.59