Finding the Third Proportional to 12,720.94 and 19,411.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,720.94 : 19,411.31 = 19,411.31 : x
2. Step 2: Convert to fraction form
   12,720.94/19,411.31 = 19,411.31/x
3. Step 3: Cross multiply
   12,720.94x = 19,411.31 × 19,411.31
4. Step 4: Simplify right side
   12,720.94x = 376,799,052.97
5. Step 5: Solve for x
   x = 376,799,052.97/12,720.94
6. Step 6: Final answer
   x = 29,620.38