Finding the Third Proportional to 400,572 and 869,616

Step by Step Solution

1. Step 1: Write the proportion equation
   400,572 : 869,616 = 869,616 : x
2. Step 2: Convert to fraction form
   400,572/869,616 = 869,616/x
3. Step 3: Cross multiply
   400,572x = 869,616 × 869,616
4. Step 4: Simplify right side
   400,572x = 756,231,987,456
5. Step 5: Solve for x
   x = 756,231,987,456/400,572
6. Step 6: Final answer
   x = 1,887,880.30