Finding the Third Proportional to 53.69 and 83.50

Step by Step Solution

1. Step 1: Write the proportion equation
   53.69 : 83.50 = 83.50 : x
2. Step 2: Convert to fraction form
   53.69/83.50 = 83.50/x
3. Step 3: Cross multiply
   53.69x = 83.50 × 83.50
4. Step 4: Simplify right side
   53.69x = 6,972.25
5. Step 5: Solve for x
   x = 6,972.25/53.69
6. Step 6: Final answer
   x = 129.87