Finding the Fourth Proportional to 10,559.88, 15,825.83 and 5,618.88

Step by Step Solution

1. Step 1: Write the proportion equation
   10,559.88 : 15,825.83 = 5,618.88 : x
2. Step 2: Convert to fraction form
   10,559.88/15,825.83 = 5,618.88/x
3. Step 3: Cross multiply
   10,559.88x = 15,825.83 × 5,618.88
4. Step 4: Simplify right side
   10,559.88x = 88,923,411.58
5. Step 5: Solve for x
   x = 88,923,411.58/10,559.88
6. Step 6: Final answer
   x = 8,420.87