Finding the Third Proportional to 1,291.50 and 2,765.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,291.50 : 2,765.25 = 2,765.25 : x
2. Step 2: Convert to fraction form
   1,291.50/2,765.25 = 2,765.25/x
3. Step 3: Cross multiply
   1,291.50x = 2,765.25 × 2,765.25
4. Step 4: Simplify right side
   1,291.50x = 7,646,607.56
5. Step 5: Solve for x
   x = 7,646,607.56/1,291.50
6. Step 6: Final answer
   x = 5,920.72