Finding the Third Proportional to 7,212.66 and 10,915.31

Step by Step Solution

1. Step 1: Write the proportion equation
   7,212.66 : 10,915.31 = 10,915.31 : x
2. Step 2: Convert to fraction form
   7,212.66/10,915.31 = 10,915.31/x
3. Step 3: Cross multiply
   7,212.66x = 10,915.31 × 10,915.31
4. Step 4: Simplify right side
   7,212.66x = 119,144,046.97
5. Step 5: Solve for x
   x = 119,144,046.97/7,212.66
6. Step 6: Final answer
   x = 16,518.75