Finding the Third Proportional to 760.31 and 1,141.31

Step by Step Solution

1. Step 1: Write the proportion equation
   760.31 : 1,141.31 = 1,141.31 : x
2. Step 2: Convert to fraction form
   760.31/1,141.31 = 1,141.31/x
3. Step 3: Cross multiply
   760.31x = 1,141.31 × 1,141.31
4. Step 4: Simplify right side
   760.31x = 1,302,594.22
5. Step 5: Solve for x
   x = 1,302,594.22/760.31
6. Step 6: Final answer
   x = 1,713.24