Finding the Third Proportional to 67,891.50 and 89,284.50

Step by Step Solution

1. Step 1: Write the proportion equation
   67,891.50 : 89,284.50 = 89,284.50 : x
2. Step 2: Convert to fraction form
   67,891.50/89,284.50 = 89,284.50/x
3. Step 3: Cross multiply
   67,891.50x = 89,284.50 × 89,284.50
4. Step 4: Simplify right side
   67,891.50x = 7,971,721,940.25
5. Step 5: Solve for x
   x = 7,971,721,940.25/67,891.50
6. Step 6: Final answer
   x = 117,418.56