Finding the Fourth Proportional to 8,404.22, 12,599.34 and 3,136.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,404.22 : 12,599.34 = 3,136.31 : x
2. Step 2: Convert to fraction form
   8,404.22/12,599.34 = 3,136.31/x
3. Step 3: Cross multiply
   8,404.22x = 12,599.34 × 3,136.31
4. Step 4: Simplify right side
   8,404.22x = 39,515,436.04
5. Step 5: Solve for x
   x = 39,515,436.04/8,404.22
6. Step 6: Final answer
   x = 4,701.86