Finding the Third Proportional to 317,207 and 430,596.50

Step by Step Solution

1. Step 1: Write the proportion equation
   317,207 : 430,596.50 = 430,596.50 : x
2. Step 2: Convert to fraction form
   317,207/430,596.50 = 430,596.50/x
3. Step 3: Cross multiply
   317,207x = 430,596.50 × 430,596.50
4. Step 4: Simplify right side
   317,207x = 185,413,345,812.25
5. Step 5: Solve for x
   x = 185,413,345,812.25/317,207
6. Step 6: Final answer
   x = 584,518.46