Finding the Third Proportional to 12,906 and 19,932.75

Step by Step Solution

1. Step 1: Write the proportion equation
   12,906 : 19,932.75 = 19,932.75 : x
2. Step 2: Convert to fraction form
   12,906/19,932.75 = 19,932.75/x
3. Step 3: Cross multiply
   12,906x = 19,932.75 × 19,932.75
4. Step 4: Simplify right side
   12,906x = 397,314,522.56
5. Step 5: Solve for x
   x = 397,314,522.56/12,906
6. Step 6: Final answer
   x = 30,785.26