Finding the Third Proportional to 312,741 and 503,556.75

Step by Step Solution

1. Step 1: Write the proportion equation
   312,741 : 503,556.75 = 503,556.75 : x
2. Step 2: Convert to fraction form
   312,741/503,556.75 = 503,556.75/x
3. Step 3: Cross multiply
   312,741x = 503,556.75 × 503,556.75
4. Step 4: Simplify right side
   312,741x = 253,569,400,470.56
5. Step 5: Solve for x
   x = 253,569,400,470.56/312,741
6. Step 6: Final answer
   x = 810,796.80