Finding the Fourth Proportional to 9,136.15, 12,607.82 and 5,158.04

Step by Step Solution

1. Step 1: Write the proportion equation
   9,136.15 : 12,607.82 = 5,158.04 : x
2. Step 2: Convert to fraction form
   9,136.15/12,607.82 = 5,158.04/x
3. Step 3: Cross multiply
   9,136.15x = 12,607.82 × 5,158.04
4. Step 4: Simplify right side
   9,136.15x = 65,031,570.39
5. Step 5: Solve for x
   x = 65,031,570.39/9,136.15
6. Step 6: Final answer
   x = 7,118.05