Finding the Third Proportional to 11,999.81 and 16,055.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,999.81 : 16,055.72 = 16,055.72 : x
2. Step 2: Convert to fraction form
   11,999.81/16,055.72 = 16,055.72/x
3. Step 3: Cross multiply
   11,999.81x = 16,055.72 × 16,055.72
4. Step 4: Simplify right side
   11,999.81x = 257,786,104.58
5. Step 5: Solve for x
   x = 257,786,104.58/11,999.81
6. Step 6: Final answer
   x = 21,482.51