Finding the Third Proportional to 13,415.50 and 19,964.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,415.50 : 19,964.50 = 19,964.50 : x
2. Step 2: Convert to fraction form
   13,415.50/19,964.50 = 19,964.50/x
3. Step 3: Cross multiply
   13,415.50x = 19,964.50 × 19,964.50
4. Step 4: Simplify right side
   13,415.50x = 398,581,260.25
5. Step 5: Solve for x
   x = 398,581,260.25/13,415.50
6. Step 6: Final answer
   x = 29,710.50