Finding the Third Proportional to 72.50 and 189.25

Step by Step Solution

1. Step 1: Write the proportion equation
   72.50 : 189.25 = 189.25 : x
2. Step 2: Convert to fraction form
   72.50/189.25 = 189.25/x
3. Step 3: Cross multiply
   72.50x = 189.25 × 189.25
4. Step 4: Simplify right side
   72.50x = 35,815.56
5. Step 5: Solve for x
   x = 35,815.56/72.50
6. Step 6: Final answer
   x = 494.01