Finding the Third Proportional to 5,490.75 and 10,709.25

Step by Step Solution

1. Step 1: Write the proportion equation
   5,490.75 : 10,709.25 = 10,709.25 : x
2. Step 2: Convert to fraction form
   5,490.75/10,709.25 = 10,709.25/x
3. Step 3: Cross multiply
   5,490.75x = 10,709.25 × 10,709.25
4. Step 4: Simplify right side
   5,490.75x = 114,688,035.56
5. Step 5: Solve for x
   x = 114,688,035.56/5,490.75
6. Step 6: Final answer
   x = 20,887.50