Finding the Third Proportional to 440,634 and 659,278.50

Step by Step Solution

1. Step 1: Write the proportion equation
   440,634 : 659,278.50 = 659,278.50 : x
2. Step 2: Convert to fraction form
   440,634/659,278.50 = 659,278.50/x
3. Step 3: Cross multiply
   440,634x = 659,278.50 × 659,278.50
4. Step 4: Simplify right side
   440,634x = 434,648,140,562.25
5. Step 5: Solve for x
   x = 434,648,140,562.25/440,634
6. Step 6: Final answer
   x = 986,415.35