Finding the Third Proportional to 5,218.50 and 7,956.75

Step by Step Solution

1. Step 1: Write the proportion equation
   5,218.50 : 7,956.75 = 7,956.75 : x
2. Step 2: Convert to fraction form
   5,218.50/7,956.75 = 7,956.75/x
3. Step 3: Cross multiply
   5,218.50x = 7,956.75 × 7,956.75
4. Step 4: Simplify right side
   5,218.50x = 63,309,870.56
5. Step 5: Solve for x
   x = 63,309,870.56/5,218.50
6. Step 6: Final answer
   x = 12,131.81