Finding the Third Proportional to 10,957.50 and 15,511.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,957.50 : 15,511.50 = 15,511.50 : x
2. Step 2: Convert to fraction form
   10,957.50/15,511.50 = 15,511.50/x
3. Step 3: Cross multiply
   10,957.50x = 15,511.50 × 15,511.50
4. Step 4: Simplify right side
   10,957.50x = 240,606,632.25
5. Step 5: Solve for x
   x = 240,606,632.25/10,957.50
6. Step 6: Final answer
   x = 21,958.17