Finding the Third Proportional to 21,718.13 and 28,891.69

Step by Step Solution

1. Step 1: Write the proportion equation
   21,718.13 : 28,891.69 = 28,891.69 : x
2. Step 2: Convert to fraction form
   21,718.13/28,891.69 = 28,891.69/x
3. Step 3: Cross multiply
   21,718.13x = 28,891.69 × 28,891.69
4. Step 4: Simplify right side
   21,718.13x = 834,729,606.60
5. Step 5: Solve for x
   x = 834,729,606.60/21,718.13
6. Step 6: Final answer
   x = 38,434.70