Finding the Fourth Proportional to 15,642.42, 21,586.41 and 8,568.69

Step by Step Solution

1. Step 1: Write the proportion equation
   15,642.42 : 21,586.41 = 8,568.69 : x
2. Step 2: Convert to fraction form
   15,642.42/21,586.41 = 8,568.69/x
3. Step 3: Cross multiply
   15,642.42x = 21,586.41 × 8,568.69
4. Step 4: Simplify right side
   15,642.42x = 184,967,255.50
5. Step 5: Solve for x
   x = 184,967,255.50/15,642.42
6. Step 6: Final answer
   x = 11,824.72