Finding the Third Proportional to 13,410.56 and 15,840.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,410.56 : 15,840.56 = 15,840.56 : x
2. Step 2: Convert to fraction form
   13,410.56/15,840.56 = 15,840.56/x
3. Step 3: Cross multiply
   13,410.56x = 15,840.56 × 15,840.56
4. Step 4: Simplify right side
   13,410.56x = 250,923,420.32
5. Step 5: Solve for x
   x = 250,923,420.32/13,410.56
6. Step 6: Final answer
   x = 18,710.88