Finding the Fourth Proportional to 11,971.72, 16,516.06 and 7,722.19

Step by Step Solution

1. Step 1: Write the proportion equation
   11,971.72 : 16,516.06 = 7,722.19 : x
2. Step 2: Convert to fraction form
   11,971.72/16,516.06 = 7,722.19/x
3. Step 3: Cross multiply
   11,971.72x = 16,516.06 × 7,722.19
4. Step 4: Simplify right side
   11,971.72x = 127,540,153.37
5. Step 5: Solve for x
   x = 127,540,153.37/11,971.72
6. Step 6: Final answer
   x = 10,653.45