Finding the Third Proportional to 2,311.31 and 3,558.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,311.31 : 3,558.38 = 3,558.38 : x
2. Step 2: Convert to fraction form
   2,311.31/3,558.38 = 3,558.38/x
3. Step 3: Cross multiply
   2,311.31x = 3,558.38 × 3,558.38
4. Step 4: Simplify right side
   2,311.31x = 12,662,032.64
5. Step 5: Solve for x
   x = 12,662,032.64/2,311.31
6. Step 6: Final answer
   x = 5,478.29