Finding the Third Proportional to 11,971.55 and 17,609.91

Step by Step Solution

1. Step 1: Write the proportion equation
   11,971.55 : 17,609.91 = 17,609.91 : x
2. Step 2: Convert to fraction form
   11,971.55/17,609.91 = 17,609.91/x
3. Step 3: Cross multiply
   11,971.55x = 17,609.91 × 17,609.91
4. Step 4: Simplify right side
   11,971.55x = 310,108,798.13
5. Step 5: Solve for x
   x = 310,108,798.13/11,971.55
6. Step 6: Final answer
   x = 25,903.82