Finding the Fourth Proportional to 10,578.89, 15,869.69 and 3,555.87

Step by Step Solution

1. Step 1: Write the proportion equation
   10,578.89 : 15,869.69 = 3,555.87 : x
2. Step 2: Convert to fraction form
   10,578.89/15,869.69 = 3,555.87/x
3. Step 3: Cross multiply
   10,578.89x = 15,869.69 × 3,555.87
4. Step 4: Simplify right side
   10,578.89x = 56,430,554.58
5. Step 5: Solve for x
   x = 56,430,554.58/10,578.89
6. Step 6: Final answer
   x = 5,334.26