Finding the Third Proportional to 550.55 and 805.15

Step by Step Solution

1. Step 1: Write the proportion equation
   550.55 : 805.15 = 805.15 : x
2. Step 2: Convert to fraction form
   550.55/805.15 = 805.15/x
3. Step 3: Cross multiply
   550.55x = 805.15 × 805.15
4. Step 4: Simplify right side
   550.55x = 648,264.01
5. Step 5: Solve for x
   x = 648,264.01/550.55
6. Step 6: Final answer
   x = 1,177.49