Finding the Third Proportional to 30,801.75 and 66,308.25

Step by Step Solution

1. Step 1: Write the proportion equation
   30,801.75 : 66,308.25 = 66,308.25 : x
2. Step 2: Convert to fraction form
   30,801.75/66,308.25 = 66,308.25/x
3. Step 3: Cross multiply
   30,801.75x = 66,308.25 × 66,308.25
4. Step 4: Simplify right side
   30,801.75x = 4,396,784,018.06
5. Step 5: Solve for x
   x = 4,396,784,018.06/30,801.75
6. Step 6: Final answer
   x = 142,744.62