Finding the Third Proportional to 5,186.25 and 8,245.88

Step by Step Solution

1. Step 1: Write the proportion equation
   5,186.25 : 8,245.88 = 8,245.88 : x
2. Step 2: Convert to fraction form
   5,186.25/8,245.88 = 8,245.88/x
3. Step 3: Cross multiply
   5,186.25x = 8,245.88 × 8,245.88
4. Step 4: Simplify right side
   5,186.25x = 67,994,454.52
5. Step 5: Solve for x
   x = 67,994,454.52/5,186.25
6. Step 6: Final answer
   x = 13,110.52