Finding the Third Proportional to 2,611.69 and 5,587.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,611.69 : 5,587.59 = 5,587.59 : x
2. Step 2: Convert to fraction form
   2,611.69/5,587.59 = 5,587.59/x
3. Step 3: Cross multiply
   2,611.69x = 5,587.59 × 5,587.59
4. Step 4: Simplify right side
   2,611.69x = 31,221,203.92
5. Step 5: Solve for x
   x = 31,221,203.92/2,611.69
6. Step 6: Final answer
   x = 11,954.42