Finding the Fourth Proportional to 8,648.09, 12,971.96 and 5,867.81

Step by Step Solution

1. Step 1: Write the proportion equation
   8,648.09 : 12,971.96 = 5,867.81 : x
2. Step 2: Convert to fraction form
   8,648.09/12,971.96 = 5,867.81/x
3. Step 3: Cross multiply
   8,648.09x = 12,971.96 × 5,867.81
4. Step 4: Simplify right side
   8,648.09x = 76,116,967.27
5. Step 5: Solve for x
   x = 76,116,967.27/8,648.09
6. Step 6: Final answer
   x = 8,801.59