Finding the Third Proportional to 66,985.50 and 90,968.25

Step by Step Solution

1. Step 1: Write the proportion equation
   66,985.50 : 90,968.25 = 90,968.25 : x
2. Step 2: Convert to fraction form
   66,985.50/90,968.25 = 90,968.25/x
3. Step 3: Cross multiply
   66,985.50x = 90,968.25 × 90,968.25
4. Step 4: Simplify right side
   66,985.50x = 8,275,222,508.06
5. Step 5: Solve for x
   x = 8,275,222,508.06/66,985.50
6. Step 6: Final answer
   x = 123,537.52