Finding the Fourth Proportional to 9,288.83, 12,739.77 and 8,907.37

Step by Step Solution

1. Step 1: Write the proportion equation
   9,288.83 : 12,739.77 = 8,907.37 : x
2. Step 2: Convert to fraction form
   9,288.83/12,739.77 = 8,907.37/x
3. Step 3: Cross multiply
   9,288.83x = 12,739.77 × 8,907.37
4. Step 4: Simplify right side
   9,288.83x = 113,477,838.76
5. Step 5: Solve for x
   x = 113,477,838.76/9,288.83
6. Step 6: Final answer
   x = 12,216.59