Finding the Fourth Proportional to 8,576.88, 12,865.86 and 3,314.40

Step by Step Solution

1. Step 1: Write the proportion equation
   8,576.88 : 12,865.86 = 3,314.40 : x
2. Step 2: Convert to fraction form
   8,576.88/12,865.86 = 3,314.40/x
3. Step 3: Cross multiply
   8,576.88x = 12,865.86 × 3,314.40
4. Step 4: Simplify right side
   8,576.88x = 42,642,606.38
5. Step 5: Solve for x
   x = 42,642,606.38/8,576.88
6. Step 6: Final answer
   x = 4,971.81