Finding the Third Proportional to 99.50 and 177.25

Step by Step Solution

1. Step 1: Write the proportion equation
   99.50 : 177.25 = 177.25 : x
2. Step 2: Convert to fraction form
   99.50/177.25 = 177.25/x
3. Step 3: Cross multiply
   99.50x = 177.25 × 177.25
4. Step 4: Simplify right side
   99.50x = 31,417.56
5. Step 5: Solve for x
   x = 31,417.56/99.50
6. Step 6: Final answer
   x = 315.75