Finding the Third Proportional to 2,418.75 and 5,242.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,418.75 : 5,242.50 = 5,242.50 : x
2. Step 2: Convert to fraction form
   2,418.75/5,242.50 = 5,242.50/x
3. Step 3: Cross multiply
   2,418.75x = 5,242.50 × 5,242.50
4. Step 4: Simplify right side
   2,418.75x = 27,483,806.25
5. Step 5: Solve for x
   x = 27,483,806.25/2,418.75
6. Step 6: Final answer
   x = 11,362.81