Finding the Third Proportional to 1,555.31 and 3,260.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,555.31 : 3,260.81 = 3,260.81 : x
2. Step 2: Convert to fraction form
   1,555.31/3,260.81 = 3,260.81/x
3. Step 3: Cross multiply
   1,555.31x = 3,260.81 × 3,260.81
4. Step 4: Simplify right side
   1,555.31x = 10,632,898.16
5. Step 5: Solve for x
   x = 10,632,898.16/1,555.31
6. Step 6: Final answer
   x = 6,836.50