Finding the Fourth Proportional to 10,386.04, 15,561.33 and 5,709.96

Step by Step Solution

1. Step 1: Write the proportion equation
   10,386.04 : 15,561.33 = 5,709.96 : x
2. Step 2: Convert to fraction form
   10,386.04/15,561.33 = 5,709.96/x
3. Step 3: Cross multiply
   10,386.04x = 15,561.33 × 5,709.96
4. Step 4: Simplify right side
   10,386.04x = 88,854,610.75
5. Step 5: Solve for x
   x = 88,854,610.75/10,386.04
6. Step 6: Final answer
   x = 8,555.20