Finding the Third Proportional to 20,100 and 42,360

Step by Step Solution

1. Step 1: Write the proportion equation
   20,100 : 42,360 = 42,360 : x
2. Step 2: Convert to fraction form
   20,100/42,360 = 42,360/x
3. Step 3: Cross multiply
   20,100x = 42,360 × 42,360
4. Step 4: Simplify right side
   20,100x = 1,794,369,600
5. Step 5: Solve for x
   x = 1,794,369,600/20,100
6. Step 6: Final answer
   x = 89,272.12