Finding the Third Proportional to 19,309.50 and 28,719

Step by Step Solution

1. Step 1: Write the proportion equation
   19,309.50 : 28,719 = 28,719 : x
2. Step 2: Convert to fraction form
   19,309.50/28,719 = 28,719/x
3. Step 3: Cross multiply
   19,309.50x = 28,719 × 28,719
4. Step 4: Simplify right side
   19,309.50x = 824,780,961
5. Step 5: Solve for x
   x = 824,780,961/19,309.50
6. Step 6: Final answer
   x = 42,713.74