Finding the Third Proportional to 1,131.75 and 2,420.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.75 : 2,420.25 = 2,420.25 : x
2. Step 2: Convert to fraction form
   1,131.75/2,420.25 = 2,420.25/x
3. Step 3: Cross multiply
   1,131.75x = 2,420.25 × 2,420.25
4. Step 4: Simplify right side
   1,131.75x = 5,857,610.06
5. Step 5: Solve for x
   x = 5,857,610.06/1,131.75
6. Step 6: Final answer
   x = 5,175.71