Finding the Third Proportional to 918.50 and 2,018.50

Step by Step Solution

1. Step 1: Write the proportion equation
   918.50 : 2,018.50 = 2,018.50 : x
2. Step 2: Convert to fraction form
   918.50/2,018.50 = 2,018.50/x
3. Step 3: Cross multiply
   918.50x = 2,018.50 × 2,018.50
4. Step 4: Simplify right side
   918.50x = 4,074,342.25
5. Step 5: Solve for x
   x = 4,074,342.25/918.50
6. Step 6: Final answer
   x = 4,435.87