Finding the Third Proportional to 8,879.63 and 13,810.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,879.63 : 13,810.50 = 13,810.50 : x
2. Step 2: Convert to fraction form
   8,879.63/13,810.50 = 13,810.50/x
3. Step 3: Cross multiply
   8,879.63x = 13,810.50 × 13,810.50
4. Step 4: Simplify right side
   8,879.63x = 190,729,910.25
5. Step 5: Solve for x
   x = 190,729,910.25/8,879.63
6. Step 6: Final answer
   x = 21,479.50