Finding the Third Proportional to 5,578 and 13,216

Step by Step Solution

1. Step 1: Write the proportion equation
   5,578 : 13,216 = 13,216 : x
2. Step 2: Convert to fraction form
   5,578/13,216 = 13,216/x
3. Step 3: Cross multiply
   5,578x = 13,216 × 13,216
4. Step 4: Simplify right side
   5,578x = 174,662,656
5. Step 5: Solve for x
   x = 174,662,656/5,578
6. Step 6: Final answer
   x = 31,312.77