Finding the Third Proportional to 430,201 and 668,311.50

Step by Step Solution

1. Step 1: Write the proportion equation
   430,201 : 668,311.50 = 668,311.50 : x
2. Step 2: Convert to fraction form
   430,201/668,311.50 = 668,311.50/x
3. Step 3: Cross multiply
   430,201x = 668,311.50 × 668,311.50
4. Step 4: Simplify right side
   430,201x = 446,640,261,032.25
5. Step 5: Solve for x
   x = 446,640,261,032.25/430,201
6. Step 6: Final answer
   x = 1,038,212.98