Finding the Third Proportional to 2,359.97 and 5,511.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,359.97 : 5,511.80 = 5,511.80 : x
2. Step 2: Convert to fraction form
   2,359.97/5,511.80 = 5,511.80/x
3. Step 3: Cross multiply
   2,359.97x = 5,511.80 × 5,511.80
4. Step 4: Simplify right side
   2,359.97x = 30,379,904.79
5. Step 5: Solve for x
   x = 30,379,904.79/2,359.97
6. Step 6: Final answer
   x = 12,873.01