Finding the Fourth Proportional to 9,158.78, 12,639.60 and 5,800.37

Step by Step Solution

1. Step 1: Write the proportion equation
   9,158.78 : 12,639.60 = 5,800.37 : x
2. Step 2: Convert to fraction form
   9,158.78/12,639.60 = 5,800.37/x
3. Step 3: Cross multiply
   9,158.78x = 12,639.60 × 5,800.37
4. Step 4: Simplify right side
   9,158.78x = 73,314,356.65
5. Step 5: Solve for x
   x = 73,314,356.65/9,158.78
6. Step 6: Final answer
   x = 8,004.82