Finding the Third Proportional to 285,972 and 609,942.50

Step by Step Solution

1. Step 1: Write the proportion equation
   285,972 : 609,942.50 = 609,942.50 : x
2. Step 2: Convert to fraction form
   285,972/609,942.50 = 609,942.50/x
3. Step 3: Cross multiply
   285,972x = 609,942.50 × 609,942.50
4. Step 4: Simplify right side
   285,972x = 372,029,853,306.25
5. Step 5: Solve for x
   x = 372,029,853,306.25/285,972
6. Step 6: Final answer
   x = 1,300,931.05