Finding the Third Proportional to 1,015.50 and 2,218.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015.50 : 2,218.50 = 2,218.50 : x
2. Step 2: Convert to fraction form
   1,015.50/2,218.50 = 2,218.50/x
3. Step 3: Cross multiply
   1,015.50x = 2,218.50 × 2,218.50
4. Step 4: Simplify right side
   1,015.50x = 4,921,742.25
5. Step 5: Solve for x
   x = 4,921,742.25/1,015.50
6. Step 6: Final answer
   x = 4,846.62