Finding the Fourth Proportional to 10,540.75, 15,813.71 and 3,521.51

Step by Step Solution

1. Step 1: Write the proportion equation
   10,540.75 : 15,813.71 = 3,521.51 : x
2. Step 2: Convert to fraction form
   10,540.75/15,813.71 = 3,521.51/x
3. Step 3: Cross multiply
   10,540.75x = 15,813.71 × 3,521.51
4. Step 4: Simplify right side
   10,540.75x = 55,688,133.54
5. Step 5: Solve for x
   x = 55,688,133.54/10,540.75
6. Step 6: Final answer
   x = 5,283.13