Finding the Third Proportional to 30,574.50 and 67,707.75

Step by Step Solution

1. Step 1: Write the proportion equation
   30,574.50 : 67,707.75 = 67,707.75 : x
2. Step 2: Convert to fraction form
   30,574.50/67,707.75 = 67,707.75/x
3. Step 3: Cross multiply
   30,574.50x = 67,707.75 × 67,707.75
4. Step 4: Simplify right side
   30,574.50x = 4,584,339,410.06
5. Step 5: Solve for x
   x = 4,584,339,410.06/30,574.50
6. Step 6: Final answer
   x = 149,939.96