Finding the Third Proportional to 539.31 and 1,155.56

Step by Step Solution

1. Step 1: Write the proportion equation
   539.31 : 1,155.56 = 1,155.56 : x
2. Step 2: Convert to fraction form
   539.31/1,155.56 = 1,155.56/x
3. Step 3: Cross multiply
   539.31x = 1,155.56 × 1,155.56
4. Step 4: Simplify right side
   539.31x = 1,335,324.69
5. Step 5: Solve for x
   x = 1,335,324.69/539.31
6. Step 6: Final answer
   x = 2,475.98