Finding the Third Proportional to 12,619.20 and 19,798.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,619.20 : 19,798.56 = 19,798.56 : x
2. Step 2: Convert to fraction form
   12,619.20/19,798.56 = 19,798.56/x
3. Step 3: Cross multiply
   12,619.20x = 19,798.56 × 19,798.56
4. Step 4: Simplify right side
   12,619.20x = 391,982,922.39
5. Step 5: Solve for x
   x = 391,982,922.39/12,619.20
6. Step 6: Final answer
   x = 31,062.43