Finding the Third Proportional to 2,688.19 and 5,475.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,688.19 : 5,475.94 = 5,475.94 : x
2. Step 2: Convert to fraction form
   2,688.19/5,475.94 = 5,475.94/x
3. Step 3: Cross multiply
   2,688.19x = 5,475.94 × 5,475.94
4. Step 4: Simplify right side
   2,688.19x = 29,985,891.50
5. Step 5: Solve for x
   x = 29,985,891.50/2,688.19
6. Step 6: Final answer
   x = 11,154.69