Finding the Third Proportional to 1,561.78 and 3,313.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,561.78 : 3,313.41 = 3,313.41 : x
2. Step 2: Convert to fraction form
   1,561.78/3,313.41 = 3,313.41/x
3. Step 3: Cross multiply
   1,561.78x = 3,313.41 × 3,313.41
4. Step 4: Simplify right side
   1,561.78x = 10,978,660.98
5. Step 5: Solve for x
   x = 10,978,660.98/1,561.78
6. Step 6: Final answer
   x = 7,029.58