Finding the Third Proportional to 30,820.88 and 66,323.81

Step by Step Solution

1. Step 1: Write the proportion equation
   30,820.88 : 66,323.81 = 66,323.81 : x
2. Step 2: Convert to fraction form
   30,820.88/66,323.81 = 66,323.81/x
3. Step 3: Cross multiply
   30,820.88x = 66,323.81 × 66,323.81
4. Step 4: Simplify right side
   30,820.88x = 4,398,848,104.54
5. Step 5: Solve for x
   x = 4,398,848,104.54/30,820.88
6. Step 6: Final answer
   x = 142,723.01