Finding the Third Proportional to 12,901.31 and 19,939.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,901.31 : 19,939.05 = 19,939.05 : x
2. Step 2: Convert to fraction form
   12,901.31/19,939.05 = 19,939.05/x
3. Step 3: Cross multiply
   12,901.31x = 19,939.05 × 19,939.05
4. Step 4: Simplify right side
   12,901.31x = 397,565,785.00
5. Step 5: Solve for x
   x = 397,565,785.00/12,901.31
6. Step 6: Final answer
   x = 30,815.93