Finding the Third Proportional to 3,343.78 and 7,216.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,343.78 : 7,216.59 = 7,216.59 : x
2. Step 2: Convert to fraction form
   3,343.78/7,216.59 = 7,216.59/x
3. Step 3: Cross multiply
   3,343.78x = 7,216.59 × 7,216.59
4. Step 4: Simplify right side
   3,343.78x = 52,079,225.35
5. Step 5: Solve for x
   x = 52,079,225.35/3,343.78
6. Step 6: Final answer
   x = 15,574.95