Finding the Third Proportional to 144,360 and 321,528

Step by Step Solution

1. Step 1: Write the proportion equation
   144,360 : 321,528 = 321,528 : x
2. Step 2: Convert to fraction form
   144,360/321,528 = 321,528/x
3. Step 3: Cross multiply
   144,360x = 321,528 × 321,528
4. Step 4: Simplify right side
   144,360x = 103,380,254,784
5. Step 5: Solve for x
   x = 103,380,254,784/144,360
6. Step 6: Final answer
   x = 716,128.12