Finding the Third Proportional to 19,121.50 and 28,119.50

Step by Step Solution

1. Step 1: Write the proportion equation
   19,121.50 : 28,119.50 = 28,119.50 : x
2. Step 2: Convert to fraction form
   19,121.50/28,119.50 = 28,119.50/x
3. Step 3: Cross multiply
   19,121.50x = 28,119.50 × 28,119.50
4. Step 4: Simplify right side
   19,121.50x = 790,706,280.25
5. Step 5: Solve for x
   x = 790,706,280.25/19,121.50
6. Step 6: Final answer
   x = 41,351.69