Finding the Third Proportional to 66,540.50 and 73,101.50

Step by Step Solution

1. Step 1: Write the proportion equation
   66,540.50 : 73,101.50 = 73,101.50 : x
2. Step 2: Convert to fraction form
   66,540.50/73,101.50 = 73,101.50/x
3. Step 3: Cross multiply
   66,540.50x = 73,101.50 × 73,101.50
4. Step 4: Simplify right side
   66,540.50x = 5,343,829,302.25
5. Step 5: Solve for x
   x = 5,343,829,302.25/66,540.50
6. Step 6: Final answer
   x = 80,309.43