Finding the Third Proportional to 989.50 and 1,785.50

Step by Step Solution

1. Step 1: Write the proportion equation
   989.50 : 1,785.50 = 1,785.50 : x
2. Step 2: Convert to fraction form
   989.50/1,785.50 = 1,785.50/x
3. Step 3: Cross multiply
   989.50x = 1,785.50 × 1,785.50
4. Step 4: Simplify right side
   989.50x = 3,188,010.25
5. Step 5: Solve for x
   x = 3,188,010.25/989.50
6. Step 6: Final answer
   x = 3,221.84