Finding the Third Proportional to 231,240 and 501,789

Step by Step Solution

1. Step 1: Write the proportion equation
   231,240 : 501,789 = 501,789 : x
2. Step 2: Convert to fraction form
   231,240/501,789 = 501,789/x
3. Step 3: Cross multiply
   231,240x = 501,789 × 501,789
4. Step 4: Simplify right side
   231,240x = 251,792,200,521
5. Step 5: Solve for x
   x = 251,792,200,521/231,240
6. Step 6: Final answer
   x = 1,088,878.22