Finding the Third Proportional to 425,913 and 659,389.50

Step by Step Solution

1. Step 1: Write the proportion equation
   425,913 : 659,389.50 = 659,389.50 : x
2. Step 2: Convert to fraction form
   425,913/659,389.50 = 659,389.50/x
3. Step 3: Cross multiply
   425,913x = 659,389.50 × 659,389.50
4. Step 4: Simplify right side
   425,913x = 434,794,512,710.25
5. Step 5: Solve for x
   x = 434,794,512,710.25/425,913
6. Step 6: Final answer
   x = 1,020,852.88