Finding the Third Proportional to 321,112 and 500,056

Step by Step Solution

1. Step 1: Write the proportion equation
   321,112 : 500,056 = 500,056 : x
2. Step 2: Convert to fraction form
   321,112/500,056 = 500,056/x
3. Step 3: Cross multiply
   321,112x = 500,056 × 500,056
4. Step 4: Simplify right side
   321,112x = 250,056,003,136
5. Step 5: Solve for x
   x = 250,056,003,136/321,112
6. Step 6: Final answer
   x = 778,718.96