Finding the Third Proportional to 12,917 and 19,289.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,917 : 19,289.50 = 19,289.50 : x
2. Step 2: Convert to fraction form
   12,917/19,289.50 = 19,289.50/x
3. Step 3: Cross multiply
   12,917x = 19,289.50 × 19,289.50
4. Step 4: Simplify right side
   12,917x = 372,084,810.25
5. Step 5: Solve for x
   x = 372,084,810.25/12,917
6. Step 6: Final answer
   x = 28,805.82