Finding the Third Proportional to 1,580 and 1,772

Step by Step Solution

1. Step 1: Write the proportion equation
   1,580 : 1,772 = 1,772 : x
2. Step 2: Convert to fraction form
   1,580/1,772 = 1,772/x
3. Step 3: Cross multiply
   1,580x = 1,772 × 1,772
4. Step 4: Simplify right side
   1,580x = 3,139,984
5. Step 5: Solve for x
   x = 3,139,984/1,580
6. Step 6: Final answer
   x = 1,987.33