Finding the Third Proportional to 3,557.50 and 7,772

Step by Step Solution

1. Step 1: Write the proportion equation
   3,557.50 : 7,772 = 7,772 : x
2. Step 2: Convert to fraction form
   3,557.50/7,772 = 7,772/x
3. Step 3: Cross multiply
   3,557.50x = 7,772 × 7,772
4. Step 4: Simplify right side
   3,557.50x = 60,403,984
5. Step 5: Solve for x
   x = 60,403,984/3,557.50
6. Step 6: Final answer
   x = 16,979.33