Finding the Third Proportional to 30,908.81 and 66,191.06

Step by Step Solution

1. Step 1: Write the proportion equation
   30,908.81 : 66,191.06 = 66,191.06 : x
2. Step 2: Convert to fraction form
   30,908.81/66,191.06 = 66,191.06/x
3. Step 3: Cross multiply
   30,908.81x = 66,191.06 × 66,191.06
4. Step 4: Simplify right side
   30,908.81x = 4,381,256,754.88
5. Step 5: Solve for x
   x = 4,381,256,754.88/30,908.81
6. Step 6: Final answer
   x = 141,747.82