Finding the Third Proportional to 430,197 and 668,305.50

Step by Step Solution

1. Step 1: Write the proportion equation
   430,197 : 668,305.50 = 668,305.50 : x
2. Step 2: Convert to fraction form
   430,197/668,305.50 = 668,305.50/x
3. Step 3: Cross multiply
   430,197x = 668,305.50 × 668,305.50
4. Step 4: Simplify right side
   430,197x = 446,632,241,330.25
5. Step 5: Solve for x
   x = 446,632,241,330.25/430,197
6. Step 6: Final answer
   x = 1,038,203.99