Finding the Third Proportional to 1,289.25 and 2,740.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,289.25 : 2,740.50 = 2,740.50 : x
2. Step 2: Convert to fraction form
   1,289.25/2,740.50 = 2,740.50/x
3. Step 3: Cross multiply
   1,289.25x = 2,740.50 × 2,740.50
4. Step 4: Simplify right side
   1,289.25x = 7,510,340.25
5. Step 5: Solve for x
   x = 7,510,340.25/1,289.25
6. Step 6: Final answer
   x = 5,825.36