Finding the Third Proportional to 11,148.75 and 21,271.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,148.75 : 21,271.50 = 21,271.50 : x
2. Step 2: Convert to fraction form
   11,148.75/21,271.50 = 21,271.50/x
3. Step 3: Cross multiply
   11,148.75x = 21,271.50 × 21,271.50
4. Step 4: Simplify right side
   11,148.75x = 452,476,712.25
5. Step 5: Solve for x
   x = 452,476,712.25/11,148.75
6. Step 6: Final answer
   x = 40,585.42