Finding the Third Proportional to 13,510.25 and 20,451.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,510.25 : 20,451.50 = 20,451.50 : x
2. Step 2: Convert to fraction form
   13,510.25/20,451.50 = 20,451.50/x
3. Step 3: Cross multiply
   13,510.25x = 20,451.50 × 20,451.50
4. Step 4: Simplify right side
   13,510.25x = 418,263,852.25
5. Step 5: Solve for x
   x = 418,263,852.25/13,510.25
6. Step 6: Final answer
   x = 30,959.00