Finding the Fourth Proportional to 15,667.56, 21,621.56 and 8,593.96

Step by Step Solution

1. Step 1: Write the proportion equation
   15,667.56 : 21,621.56 = 8,593.96 : x
2. Step 2: Convert to fraction form
   15,667.56/21,621.56 = 8,593.96/x
3. Step 3: Cross multiply
   15,667.56x = 21,621.56 × 8,593.96
4. Step 4: Simplify right side
   15,667.56x = 185,814,821.78
5. Step 5: Solve for x
   x = 185,814,821.78/15,667.56
6. Step 6: Final answer
   x = 11,859.84