Finding the Third Proportional to 13,956.75 and 20,920.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,956.75 : 20,920.50 = 20,920.50 : x
2. Step 2: Convert to fraction form
   13,956.75/20,920.50 = 20,920.50/x
3. Step 3: Cross multiply
   13,956.75x = 20,920.50 × 20,920.50
4. Step 4: Simplify right side
   13,956.75x = 437,667,320.25
5. Step 5: Solve for x
   x = 437,667,320.25/13,956.75
6. Step 6: Final answer
   x = 31,358.83