Finding the Fourth Proportional to 10,578.51, 15,869.13 and 3,555.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,578.51 : 15,869.13 = 3,555.50 : x
2. Step 2: Convert to fraction form
   10,578.51/15,869.13 = 3,555.50/x
3. Step 3: Cross multiply
   10,578.51x = 15,869.13 × 3,555.50
4. Step 4: Simplify right side
   10,578.51x = 56,422,612.37
5. Step 5: Solve for x
   x = 56,422,612.37/10,578.51
6. Step 6: Final answer
   x = 5,333.70