Finding the Third Proportional to 459,609 and 686,632.50

Step by Step Solution

1. Step 1: Write the proportion equation
   459,609 : 686,632.50 = 686,632.50 : x
2. Step 2: Convert to fraction form
   459,609/686,632.50 = 686,632.50/x
3. Step 3: Cross multiply
   459,609x = 686,632.50 × 686,632.50
4. Step 4: Simplify right side
   459,609x = 471,464,190,056.25
5. Step 5: Solve for x
   x = 471,464,190,056.25/459,609
6. Step 6: Final answer
   x = 1,025,794.08