Finding the Fourth Proportional to 10,917.47, 16,378.25 and 3,521.16

Step by Step Solution

1. Step 1: Write the proportion equation
   10,917.47 : 16,378.25 = 3,521.16 : x
2. Step 2: Convert to fraction form
   10,917.47/16,378.25 = 3,521.16/x
3. Step 3: Cross multiply
   10,917.47x = 16,378.25 × 3,521.16
4. Step 4: Simplify right side
   10,917.47x = 57,670,421.16
5. Step 5: Solve for x
   x = 57,670,421.16/10,917.47
6. Step 6: Final answer
   x = 5,282.40