Finding the Third Proportional to 609,783 and 905,824.50

Step by Step Solution

1. Step 1: Write the proportion equation
   609,783 : 905,824.50 = 905,824.50 : x
2. Step 2: Convert to fraction form
   609,783/905,824.50 = 905,824.50/x
3. Step 3: Cross multiply
   609,783x = 905,824.50 × 905,824.50
4. Step 4: Simplify right side
   609,783x = 820,518,024,800.25
5. Step 5: Solve for x
   x = 820,518,024,800.25/609,783
6. Step 6: Final answer
   x = 1,345,590.19