Finding the Third Proportional to 21,403.78 and 34,087.69

Step by Step Solution

1. Step 1: Write the proportion equation
   21,403.78 : 34,087.69 = 34,087.69 : x
2. Step 2: Convert to fraction form
   21,403.78/34,087.69 = 34,087.69/x
3. Step 3: Cross multiply
   21,403.78x = 34,087.69 × 34,087.69
4. Step 4: Simplify right side
   21,403.78x = 1,161,970,439.10
5. Step 5: Solve for x
   x = 1,161,970,439.10/21,403.78
6. Step 6: Final answer
   x = 54,288.09