Finding the Third Proportional to 11,260 and 17,920.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,260 : 17,920.50 = 17,920.50 : x
2. Step 2: Convert to fraction form
   11,260/17,920.50 = 17,920.50/x
3. Step 3: Cross multiply
   11,260x = 17,920.50 × 17,920.50
4. Step 4: Simplify right side
   11,260x = 321,144,320.25
5. Step 5: Solve for x
   x = 321,144,320.25/11,260
6. Step 6: Final answer
   x = 28,520.81