Finding the Fourth Proportional to 15,667.24, 21,620.10 and 8,953.96

Step by Step Solution

1. Step 1: Write the proportion equation
   15,667.24 : 21,620.10 = 8,953.96 : x
2. Step 2: Convert to fraction form
   15,667.24/21,620.10 = 8,953.96/x
3. Step 3: Cross multiply
   15,667.24x = 21,620.10 × 8,953.96
4. Step 4: Simplify right side
   15,667.24x = 193,585,510.60
5. Step 5: Solve for x
   x = 193,585,510.60/15,667.24
6. Step 6: Final answer
   x = 12,356.07