Finding the Third Proportional to 3,111 and 3,556.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,111 : 3,556.50 = 3,556.50 : x
2. Step 2: Convert to fraction form
   3,111/3,556.50 = 3,556.50/x
3. Step 3: Cross multiply
   3,111x = 3,556.50 × 3,556.50
4. Step 4: Simplify right side
   3,111x = 12,648,692.25
5. Step 5: Solve for x
   x = 12,648,692.25/3,111
6. Step 6: Final answer
   x = 4,065.80