Finding the Third Proportional to 9,879 and 13,153.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,879 : 13,153.50 = 13,153.50 : x
2. Step 2: Convert to fraction form
   9,879/13,153.50 = 13,153.50/x
3. Step 3: Cross multiply
   9,879x = 13,153.50 × 13,153.50
4. Step 4: Simplify right side
   9,879x = 173,014,562.25
5. Step 5: Solve for x
   x = 173,014,562.25/9,879
6. Step 6: Final answer
   x = 17,513.37