Finding the Third Proportional to 30,791.81 and 66,331.69

Step by Step Solution

1. Step 1: Write the proportion equation
   30,791.81 : 66,331.69 = 66,331.69 : x
2. Step 2: Convert to fraction form
   30,791.81/66,331.69 = 66,331.69/x
3. Step 3: Cross multiply
   30,791.81x = 66,331.69 × 66,331.69
4. Step 4: Simplify right side
   30,791.81x = 4,399,892,766.60
5. Step 5: Solve for x
   x = 4,399,892,766.60/30,791.81
6. Step 6: Final answer
   x = 142,891.65