Finding the Third Proportional to 21,120 and 45,360

Step by Step Solution

1. Step 1: Write the proportion equation
   21,120 : 45,360 = 45,360 : x
2. Step 2: Convert to fraction form
   21,120/45,360 = 45,360/x
3. Step 3: Cross multiply
   21,120x = 45,360 × 45,360
4. Step 4: Simplify right side
   21,120x = 2,057,529,600
5. Step 5: Solve for x
   x = 2,057,529,600/21,120
6. Step 6: Final answer
   x = 97,420.91