Finding the Fourth Proportional to 8,648.96, 12,956.34 and 5,718.38

Step by Step Solution

1. Step 1: Write the proportion equation
   8,648.96 : 12,956.34 = 5,718.38 : x
2. Step 2: Convert to fraction form
   8,648.96/12,956.34 = 5,718.38/x
3. Step 3: Cross multiply
   8,648.96x = 12,956.34 × 5,718.38
4. Step 4: Simplify right side
   8,648.96x = 74,089,275.53
5. Step 5: Solve for x
   x = 74,089,275.53/8,648.96
6. Step 6: Final answer
   x = 8,566.26