Finding the Third Proportional to 318,896 and 500,300

Step by Step Solution

1. Step 1: Write the proportion equation
   318,896 : 500,300 = 500,300 : x
2. Step 2: Convert to fraction form
   318,896/500,300 = 500,300/x
3. Step 3: Cross multiply
   318,896x = 500,300 × 500,300
4. Step 4: Simplify right side
   318,896x = 250,300,090,000
5. Step 5: Solve for x
   x = 250,300,090,000/318,896
6. Step 6: Final answer
   x = 784,895.67