Finding the Third Proportional to 8,356.50 and 13,439.25

Step by Step Solution

1. Step 1: Write the proportion equation
   8,356.50 : 13,439.25 = 13,439.25 : x
2. Step 2: Convert to fraction form
   8,356.50/13,439.25 = 13,439.25/x
3. Step 3: Cross multiply
   8,356.50x = 13,439.25 × 13,439.25
4. Step 4: Simplify right side
   8,356.50x = 180,613,440.56
5. Step 5: Solve for x
   x = 180,613,440.56/8,356.50
6. Step 6: Final answer
   x = 21,613.53