Finding the Third Proportional to 3,909 and 10,555.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,909 : 10,555.50 = 10,555.50 : x
2. Step 2: Convert to fraction form
   3,909/10,555.50 = 10,555.50/x
3. Step 3: Cross multiply
   3,909x = 10,555.50 × 10,555.50
4. Step 4: Simplify right side
   3,909x = 111,418,580.25
5. Step 5: Solve for x
   x = 111,418,580.25/3,909
6. Step 6: Final answer
   x = 28,503.09