Finding the Third Proportional to 5,286 and 7,456.50

Step by Step Solution

1. Step 1: Write the proportion equation
   5,286 : 7,456.50 = 7,456.50 : x
2. Step 2: Convert to fraction form
   5,286/7,456.50 = 7,456.50/x
3. Step 3: Cross multiply
   5,286x = 7,456.50 × 7,456.50
4. Step 4: Simplify right side
   5,286x = 55,599,392.25
5. Step 5: Solve for x
   x = 55,599,392.25/5,286
6. Step 6: Final answer
   x = 10,518.24