Finding the Third Proportional to 407,430 and 629,754.75

Step by Step Solution

1. Step 1: Write the proportion equation
   407,430 : 629,754.75 = 629,754.75 : x
2. Step 2: Convert to fraction form
   407,430/629,754.75 = 629,754.75/x
3. Step 3: Cross multiply
   407,430x = 629,754.75 × 629,754.75
4. Step 4: Simplify right side
   407,430x = 396,591,045,147.56
5. Step 5: Solve for x
   x = 396,591,045,147.56/407,430
6. Step 6: Final answer
   x = 973,396.77