Finding the Third Proportional to 254,186 and 501,990

Step by Step Solution

1. Step 1: Write the proportion equation
   254,186 : 501,990 = 501,990 : x
2. Step 2: Convert to fraction form
   254,186/501,990 = 501,990/x
3. Step 3: Cross multiply
   254,186x = 501,990 × 501,990
4. Step 4: Simplify right side
   254,186x = 251,993,960,100
5. Step 5: Solve for x
   x = 251,993,960,100/254,186
6. Step 6: Final answer
   x = 991,376.24