Finding the Fourth Proportional to 9,555.56, 13,186.77 and 5,306.71

Step by Step Solution

1. Step 1: Write the proportion equation
   9,555.56 : 13,186.77 = 5,306.71 : x
2. Step 2: Convert to fraction form
   9,555.56/13,186.77 = 5,306.71/x
3. Step 3: Cross multiply
   9,555.56x = 13,186.77 × 5,306.71
4. Step 4: Simplify right side
   9,555.56x = 69,978,364.23
5. Step 5: Solve for x
   x = 69,978,364.23/9,555.56
6. Step 6: Final answer
   x = 7,323.31