Finding the Third Proportional to 3,556 and 7,478.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,556 : 7,478.50 = 7,478.50 : x
2. Step 2: Convert to fraction form
   3,556/7,478.50 = 7,478.50/x
3. Step 3: Cross multiply
   3,556x = 7,478.50 × 7,478.50
4. Step 4: Simplify right side
   3,556x = 55,927,962.25
5. Step 5: Solve for x
   x = 55,927,962.25/3,556
6. Step 6: Final answer
   x = 15,727.77