Finding the Third Proportional to 63,504 and 90,360

Step by Step Solution

1. Step 1: Write the proportion equation
   63,504 : 90,360 = 90,360 : x
2. Step 2: Convert to fraction form
   63,504/90,360 = 90,360/x
3. Step 3: Cross multiply
   63,504x = 90,360 × 90,360
4. Step 4: Simplify right side
   63,504x = 8,164,929,600
5. Step 5: Solve for x
   x = 8,164,929,600/63,504
6. Step 6: Final answer
   x = 128,573.47