Finding the Fourth Proportional to 9,158.82, 12,640.80 and 5,181.18

Step by Step Solution

1. Step 1: Write the proportion equation
   9,158.82 : 12,640.80 = 5,181.18 : x
2. Step 2: Convert to fraction form
   9,158.82/12,640.80 = 5,181.18/x
3. Step 3: Cross multiply
   9,158.82x = 12,640.80 × 5,181.18
4. Step 4: Simplify right side
   9,158.82x = 65,494,260.14
5. Step 5: Solve for x
   x = 65,494,260.14/9,158.82
6. Step 6: Final answer
   x = 7,150.95