Finding the Third Proportional to 2,556.56 and 5,356.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,556.56 : 5,356.13 = 5,356.13 : x
2. Step 2: Convert to fraction form
   2,556.56/5,356.13 = 5,356.13/x
3. Step 3: Cross multiply
   2,556.56x = 5,356.13 × 5,356.13
4. Step 4: Simplify right side
   2,556.56x = 28,688,075.02
5. Step 5: Solve for x
   x = 28,688,075.02/2,556.56
6. Step 6: Final answer
   x = 11,221.35