Finding the Third Proportional to 21,016.13 and 28,945.69

Step by Step Solution

1. Step 1: Write the proportion equation
   21,016.13 : 28,945.69 = 28,945.69 : x
2. Step 2: Convert to fraction form
   21,016.13/28,945.69 = 28,945.69/x
3. Step 3: Cross multiply
   21,016.13x = 28,945.69 × 28,945.69
4. Step 4: Simplify right side
   21,016.13x = 837,852,824.85
5. Step 5: Solve for x
   x = 837,852,824.85/21,016.13
6. Step 6: Final answer
   x = 39,867.14