Finding the Third Proportional to 2,778.50 and 4,631.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,778.50 : 4,631.50 = 4,631.50 : x
2. Step 2: Convert to fraction form
   2,778.50/4,631.50 = 4,631.50/x
3. Step 3: Cross multiply
   2,778.50x = 4,631.50 × 4,631.50
4. Step 4: Simplify right side
   2,778.50x = 21,450,792.25
5. Step 5: Solve for x
   x = 21,450,792.25/2,778.50
6. Step 6: Final answer
   x = 7,720.28