Finding the Fourth Proportional to 10,578.51, 15,856.61 and 3,551.87

Step by Step Solution

1. Step 1: Write the proportion equation
   10,578.51 : 15,856.61 = 3,551.87 : x
2. Step 2: Convert to fraction form
   10,578.51/15,856.61 = 3,551.87/x
3. Step 3: Cross multiply
   10,578.51x = 15,856.61 × 3,551.87
4. Step 4: Simplify right side
   10,578.51x = 56,320,520.32
5. Step 5: Solve for x
   x = 56,320,520.32/10,578.51
6. Step 6: Final answer
   x = 5,324.05