Finding the Third Proportional to 425,412 and 658,631.25

Step by Step Solution

1. Step 1: Write the proportion equation
   425,412 : 658,631.25 = 658,631.25 : x
2. Step 2: Convert to fraction form
   425,412/658,631.25 = 658,631.25/x
3. Step 3: Cross multiply
   425,412x = 658,631.25 × 658,631.25
4. Step 4: Simplify right side
   425,412x = 433,795,123,476.56
5. Step 5: Solve for x
   x = 433,795,123,476.56/425,412
6. Step 6: Final answer
   x = 1,019,705.89