Finding the Third Proportional to 13,491.56 and 19,872.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,491.56 : 19,872.56 = 19,872.56 : x
2. Step 2: Convert to fraction form
   13,491.56/19,872.56 = 19,872.56/x
3. Step 3: Cross multiply
   13,491.56x = 19,872.56 × 19,872.56
4. Step 4: Simplify right side
   13,491.56x = 394,918,740.32
5. Step 5: Solve for x
   x = 394,918,740.32/13,491.56
6. Step 6: Final answer
   x = 29,271.53