Finding the Third Proportional to 250,500 and 521,688

Step by Step Solution

1. Step 1: Write the proportion equation
   250,500 : 521,688 = 521,688 : x
2. Step 2: Convert to fraction form
   250,500/521,688 = 521,688/x
3. Step 3: Cross multiply
   250,500x = 521,688 × 521,688
4. Step 4: Simplify right side
   250,500x = 272,158,369,344
5. Step 5: Solve for x
   x = 272,158,369,344/250,500
6. Step 6: Final answer
   x = 1,086,460.56