Finding the Third Proportional to 1,331.28 and 3,141.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,331.28 : 3,141.32 = 3,141.32 : x
2. Step 2: Convert to fraction form
   1,331.28/3,141.32 = 3,141.32/x
3. Step 3: Cross multiply
   1,331.28x = 3,141.32 × 3,141.32
4. Step 4: Simplify right side
   1,331.28x = 9,867,896.37
5. Step 5: Solve for x
   x = 9,867,896.37/1,331.28
6. Step 6: Final answer
   x = 7,412.34