Finding the Third Proportional to 66,485.25 and 99,776.25

Step by Step Solution

1. Step 1: Write the proportion equation
   66,485.25 : 99,776.25 = 99,776.25 : x
2. Step 2: Convert to fraction form
   66,485.25/99,776.25 = 99,776.25/x
3. Step 3: Cross multiply
   66,485.25x = 99,776.25 × 99,776.25
4. Step 4: Simplify right side
   66,485.25x = 9,955,300,064.06
5. Step 5: Solve for x
   x = 9,955,300,064.06/66,485.25
6. Step 6: Final answer
   x = 149,736.97