Finding the Third Proportional to 369,820 and 528,456

Step by Step Solution

1. Step 1: Write the proportion equation
   369,820 : 528,456 = 528,456 : x
2. Step 2: Convert to fraction form
   369,820/528,456 = 528,456/x
3. Step 3: Cross multiply
   369,820x = 528,456 × 528,456
4. Step 4: Simplify right side
   369,820x = 279,265,743,936
5. Step 5: Solve for x
   x = 279,265,743,936/369,820
6. Step 6: Final answer
   x = 755,139.65