Finding the Third Proportional to 2,485.97 and 5,411.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,485.97 : 5,411.39 = 5,411.39 : x
2. Step 2: Convert to fraction form
   2,485.97/5,411.39 = 5,411.39/x
3. Step 3: Cross multiply
   2,485.97x = 5,411.39 × 5,411.39
4. Step 4: Simplify right side
   2,485.97x = 29,283,148.50
5. Step 5: Solve for x
   x = 29,283,148.50/2,485.97
6. Step 6: Final answer
   x = 11,779.37