Finding the Third Proportional to 8,418 and 10,732.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,418 : 10,732.50 = 10,732.50 : x
2. Step 2: Convert to fraction form
   8,418/10,732.50 = 10,732.50/x
3. Step 3: Cross multiply
   8,418x = 10,732.50 × 10,732.50
4. Step 4: Simplify right side
   8,418x = 115,186,556.25
5. Step 5: Solve for x
   x = 115,186,556.25/8,418
6. Step 6: Final answer
   x = 13,683.36