Finding the Third Proportional to 455,274 and 668,146.50

Step by Step Solution

1. Step 1: Write the proportion equation
   455,274 : 668,146.50 = 668,146.50 : x
2. Step 2: Convert to fraction form
   455,274/668,146.50 = 668,146.50/x
3. Step 3: Cross multiply
   455,274x = 668,146.50 × 668,146.50
4. Step 4: Simplify right side
   455,274x = 446,419,745,462.25
5. Step 5: Solve for x
   x = 446,419,745,462.25/455,274
6. Step 6: Final answer
   x = 980,551.81