Finding the Third Proportional to 2,556.35 and 5,421.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,556.35 : 5,421.73 = 5,421.73 : x
2. Step 2: Convert to fraction form
   2,556.35/5,421.73 = 5,421.73/x
3. Step 3: Cross multiply
   2,556.35x = 5,421.73 × 5,421.73
4. Step 4: Simplify right side
   2,556.35x = 29,395,118.92
5. Step 5: Solve for x
   x = 29,395,118.92/2,556.35
6. Step 6: Final answer
   x = 11,498.86