Finding the Third Proportional to 30,521.81 and 64,369.69

Step by Step Solution

1. Step 1: Write the proportion equation
   30,521.81 : 64,369.69 = 64,369.69 : x
2. Step 2: Convert to fraction form
   30,521.81/64,369.69 = 64,369.69/x
3. Step 3: Cross multiply
   30,521.81x = 64,369.69 × 64,369.69
4. Step 4: Simplify right side
   30,521.81x = 4,143,456,668.85
5. Step 5: Solve for x
   x = 4,143,456,668.85/30,521.81
6. Step 6: Final answer
   x = 135,753.95