Finding the Third Proportional to 65,729.25 and 71,583.75

Step by Step Solution

1. Step 1: Write the proportion equation
   65,729.25 : 71,583.75 = 71,583.75 : x
2. Step 2: Convert to fraction form
   65,729.25/71,583.75 = 71,583.75/x
3. Step 3: Cross multiply
   65,729.25x = 71,583.75 × 71,583.75
4. Step 4: Simplify right side
   65,729.25x = 5,124,233,264.06
5. Step 5: Solve for x
   x = 5,124,233,264.06/65,729.25
6. Step 6: Final answer
   x = 77,959.71