Finding the Third Proportional to 2,170.50 and 4,980.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,170.50 : 4,980.75 = 4,980.75 : x
2. Step 2: Convert to fraction form
   2,170.50/4,980.75 = 4,980.75/x
3. Step 3: Cross multiply
   2,170.50x = 4,980.75 × 4,980.75
4. Step 4: Simplify right side
   2,170.50x = 24,807,870.56
5. Step 5: Solve for x
   x = 24,807,870.56/2,170.50
6. Step 6: Final answer
   x = 11,429.56