Finding the Third Proportional to 66,530.50 and 73,091.50

Step by Step Solution

1. Step 1: Write the proportion equation
   66,530.50 : 73,091.50 = 73,091.50 : x
2. Step 2: Convert to fraction form
   66,530.50/73,091.50 = 73,091.50/x
3. Step 3: Cross multiply
   66,530.50x = 73,091.50 × 73,091.50
4. Step 4: Simplify right side
   66,530.50x = 5,342,367,372.25
5. Step 5: Solve for x
   x = 5,342,367,372.25/66,530.50
6. Step 6: Final answer
   x = 80,299.52