Finding the Third Proportional to 21,678.75 and 34,350.75

Step by Step Solution

1. Step 1: Write the proportion equation
   21,678.75 : 34,350.75 = 34,350.75 : x
2. Step 2: Convert to fraction form
   21,678.75/34,350.75 = 34,350.75/x
3. Step 3: Cross multiply
   21,678.75x = 34,350.75 × 34,350.75
4. Step 4: Simplify right side
   21,678.75x = 1,179,974,025.56
5. Step 5: Solve for x
   x = 1,179,974,025.56/21,678.75
6. Step 6: Final answer
   x = 54,429.98