Finding the Third Proportional to 10,821.09 and 11,914.59

Step by Step Solution

1. Step 1: Write the proportion equation
   10,821.09 : 11,914.59 = 11,914.59 : x
2. Step 2: Convert to fraction form
   10,821.09/11,914.59 = 11,914.59/x
3. Step 3: Cross multiply
   10,821.09x = 11,914.59 × 11,914.59
4. Step 4: Simplify right side
   10,821.09x = 141,957,544.23
5. Step 5: Solve for x
   x = 141,957,544.23/10,821.09
6. Step 6: Final answer
   x = 13,118.59