Finding the Third Proportional to 30,883.78 and 64,212.75

Step by Step Solution

1. Step 1: Write the proportion equation
   30,883.78 : 64,212.75 = 64,212.75 : x
2. Step 2: Convert to fraction form
   30,883.78/64,212.75 = 64,212.75/x
3. Step 3: Cross multiply
   30,883.78x = 64,212.75 × 64,212.75
4. Step 4: Simplify right side
   30,883.78x = 4,123,277,262.56
5. Step 5: Solve for x
   x = 4,123,277,262.56/30,883.78
6. Step 6: Final answer
   x = 133,509.47