Finding the Third Proportional to 250,476 and 521,640

Step by Step Solution

1. Step 1: Write the proportion equation
   250,476 : 521,640 = 521,640 : x
2. Step 2: Convert to fraction form
   250,476/521,640 = 521,640/x
3. Step 3: Cross multiply
   250,476x = 521,640 × 521,640
4. Step 4: Simplify right side
   250,476x = 272,108,289,600
5. Step 5: Solve for x
   x = 272,108,289,600/250,476
6. Step 6: Final answer
   x = 1,086,364.72