Finding the Fourth Proportional to 8,407.48, 12,609.72 and 3,141.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,407.48 : 12,609.72 = 3,141.31 : x
2. Step 2: Convert to fraction form
   8,407.48/12,609.72 = 3,141.31/x
3. Step 3: Cross multiply
   8,407.48x = 12,609.72 × 3,141.31
4. Step 4: Simplify right side
   8,407.48x = 39,611,039.53
5. Step 5: Solve for x
   x = 39,611,039.53/8,407.48
6. Step 6: Final answer
   x = 4,711.40