Finding the Fourth Proportional to 10,928.61, 16,388.75 and 3,907.33

Step by Step Solution

1. Step 1: Write the proportion equation
   10,928.61 : 16,388.75 = 3,907.33 : x
2. Step 2: Convert to fraction form
   10,928.61/16,388.75 = 3,907.33/x
3. Step 3: Cross multiply
   10,928.61x = 16,388.75 × 3,907.33
4. Step 4: Simplify right side
   10,928.61x = 64,036,223.33
5. Step 5: Solve for x
   x = 64,036,223.33/10,928.61
6. Step 6: Final answer
   x = 5,859.50