Finding the Third Proportional to 5,218.13 and 8,080.88

Step by Step Solution

1. Step 1: Write the proportion equation
   5,218.13 : 8,080.88 = 8,080.88 : x
2. Step 2: Convert to fraction form
   5,218.13/8,080.88 = 8,080.88/x
3. Step 3: Cross multiply
   5,218.13x = 8,080.88 × 8,080.88
4. Step 4: Simplify right side
   5,218.13x = 65,300,540.77
5. Step 5: Solve for x
   x = 65,300,540.77/5,218.13
6. Step 6: Final answer
   x = 12,514.18