Finding the Third Proportional to 13,209.75 and 27,509.63

Step by Step Solution

1. Step 1: Write the proportion equation
   13,209.75 : 27,509.63 = 27,509.63 : x
2. Step 2: Convert to fraction form
   13,209.75/27,509.63 = 27,509.63/x
3. Step 3: Cross multiply
   13,209.75x = 27,509.63 × 27,509.63
4. Step 4: Simplify right side
   13,209.75x = 756,779,467.64
5. Step 5: Solve for x
   x = 756,779,467.64/13,209.75
6. Step 6: Final answer
   x = 57,289.46