Finding the Third Proportional to 643,182 and 945,503

Step by Step Solution

1. Step 1: Write the proportion equation
   643,182 : 945,503 = 945,503 : x
2. Step 2: Convert to fraction form
   643,182/945,503 = 945,503/x
3. Step 3: Cross multiply
   643,182x = 945,503 × 945,503
4. Step 4: Simplify right side
   643,182x = 893,975,923,009
5. Step 5: Solve for x
   x = 893,975,923,009/643,182
6. Step 6: Final answer
   x = 1,389,926.84