Finding the Third Proportional to 18,969.75 and 28,515.38

Step by Step Solution

1. Step 1: Write the proportion equation
   18,969.75 : 28,515.38 = 28,515.38 : x
2. Step 2: Convert to fraction form
   18,969.75/28,515.38 = 28,515.38/x
3. Step 3: Cross multiply
   18,969.75x = 28,515.38 × 28,515.38
4. Step 4: Simplify right side
   18,969.75x = 813,126,611.39
5. Step 5: Solve for x
   x = 813,126,611.39/18,969.75
6. Step 6: Final answer
   x = 42,864.38