Finding the Third Proportional to 503,018 and 785,144.50

Step by Step Solution

1. Step 1: Write the proportion equation
   503,018 : 785,144.50 = 785,144.50 : x
2. Step 2: Convert to fraction form
   503,018/785,144.50 = 785,144.50/x
3. Step 3: Cross multiply
   503,018x = 785,144.50 × 785,144.50
4. Step 4: Simplify right side
   503,018x = 616,451,885,880.25
5. Step 5: Solve for x
   x = 616,451,885,880.25/503,018
6. Step 6: Final answer
   x = 1,225,506.61