Finding the Third Proportional to 4,780.50 and 5,260.50

Step by Step Solution

1. Step 1: Write the proportion equation
   4,780.50 : 5,260.50 = 5,260.50 : x
2. Step 2: Convert to fraction form
   4,780.50/5,260.50 = 5,260.50/x
3. Step 3: Cross multiply
   4,780.50x = 5,260.50 × 5,260.50
4. Step 4: Simplify right side
   4,780.50x = 27,672,860.25
5. Step 5: Solve for x
   x = 27,672,860.25/4,780.50
6. Step 6: Final answer
   x = 5,788.70