Finding the Third Proportional to 76.89 and 173.00

Step by Step Solution

1. Step 1: Write the proportion equation
   76.89 : 173.00 = 173.00 : x
2. Step 2: Convert to fraction form
   76.89/173.00 = 173.00/x
3. Step 3: Cross multiply
   76.89x = 173.00 × 173.00
4. Step 4: Simplify right side
   76.89x = 29,927.31
5. Step 5: Solve for x
   x = 29,927.31/76.89
6. Step 6: Final answer
   x = 389.24