Finding the Fourth Proportional to 10,929.48, 16,390.20 and 3,907.59

Step by Step Solution

1. Step 1: Write the proportion equation
   10,929.48 : 16,390.20 = 3,907.59 : x
2. Step 2: Convert to fraction form
   10,929.48/16,390.20 = 3,907.59/x
3. Step 3: Cross multiply
   10,929.48x = 16,390.20 × 3,907.59
4. Step 4: Simplify right side
   10,929.48x = 64,046,181.62
5. Step 5: Solve for x
   x = 64,046,181.62/10,929.48
6. Step 6: Final answer
   x = 5,859.95