Finding the Third Proportional to 21,120.75 and 45,920.25

Step by Step Solution

1. Step 1: Write the proportion equation
   21,120.75 : 45,920.25 = 45,920.25 : x
2. Step 2: Convert to fraction form
   21,120.75/45,920.25 = 45,920.25/x
3. Step 3: Cross multiply
   21,120.75x = 45,920.25 × 45,920.25
4. Step 4: Simplify right side
   21,120.75x = 2,108,669,360.06
5. Step 5: Solve for x
   x = 2,108,669,360.06/21,120.75
6. Step 6: Final answer
   x = 99,838.75