Finding the Third Proportional to 4,845 and 10,189.50

Step by Step Solution

1. Step 1: Write the proportion equation
   4,845 : 10,189.50 = 10,189.50 : x
2. Step 2: Convert to fraction form
   4,845/10,189.50 = 10,189.50/x
3. Step 3: Cross multiply
   4,845x = 10,189.50 × 10,189.50
4. Step 4: Simplify right side
   4,845x = 103,825,910.25
5. Step 5: Solve for x
   x = 103,825,910.25/4,845
6. Step 6: Final answer
   x = 21,429.50