Finding the Third Proportional to 13,015.05 and 20,251.90

Step by Step Solution

1. Step 1: Write the proportion equation
   13,015.05 : 20,251.90 = 20,251.90 : x
2. Step 2: Convert to fraction form
   13,015.05/20,251.90 = 20,251.90/x
3. Step 3: Cross multiply
   13,015.05x = 20,251.90 × 20,251.90
4. Step 4: Simplify right side
   13,015.05x = 410,139,390.32
5. Step 5: Solve for x
   x = 410,139,390.32/13,015.05
6. Step 6: Final answer
   x = 31,512.69