Finding the Third Proportional to 19,920.75 and 30,910.50

Step by Step Solution

1. Step 1: Write the proportion equation
   19,920.75 : 30,910.50 = 30,910.50 : x
2. Step 2: Convert to fraction form
   19,920.75/30,910.50 = 30,910.50/x
3. Step 3: Cross multiply
   19,920.75x = 30,910.50 × 30,910.50
4. Step 4: Simplify right side
   19,920.75x = 955,459,010.25
5. Step 5: Solve for x
   x = 955,459,010.25/19,920.75
6. Step 6: Final answer
   x = 47,963.00