Finding the Third Proportional to 250,587 and 521,910

Step by Step Solution

1. Step 1: Write the proportion equation
   250,587 : 521,910 = 521,910 : x
2. Step 2: Convert to fraction form
   250,587/521,910 = 521,910/x
3. Step 3: Cross multiply
   250,587x = 521,910 × 521,910
4. Step 4: Simplify right side
   250,587x = 272,390,048,100
5. Step 5: Solve for x
   x = 272,390,048,100/250,587
6. Step 6: Final answer
   x = 1,087,007.90