Finding the Third Proportional to 491.38 and 1,158.31

Step by Step Solution

1. Step 1: Write the proportion equation
   491.38 : 1,158.31 = 1,158.31 : x
2. Step 2: Convert to fraction form
   491.38/1,158.31 = 1,158.31/x
3. Step 3: Cross multiply
   491.38x = 1,158.31 × 1,158.31
4. Step 4: Simplify right side
   491.38x = 1,341,687.85
5. Step 5: Solve for x
   x = 1,341,687.85/491.38
6. Step 6: Final answer
   x = 2,730.48