Finding the Third Proportional to 70.31 and 76.50

Step by Step Solution

1. Step 1: Write the proportion equation
   70.31 : 76.50 = 76.50 : x
2. Step 2: Convert to fraction form
   70.31/76.50 = 76.50/x
3. Step 3: Cross multiply
   70.31x = 76.50 × 76.50
4. Step 4: Simplify right side
   70.31x = 5,852.25
5. Step 5: Solve for x
   x = 5,852.25/70.31
6. Step 6: Final answer
   x = 83.23