Finding the Fourth Proportional to 9,091.56, 12,546.56 and 5,556.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,091.56 : 12,546.56 = 5,556.72 : x
2. Step 2: Convert to fraction form
   9,091.56/12,546.56 = 5,556.72/x
3. Step 3: Cross multiply
   9,091.56x = 12,546.56 × 5,556.72
4. Step 4: Simplify right side
   9,091.56x = 69,717,720.88
5. Step 5: Solve for x
   x = 69,717,720.88/9,091.56
6. Step 6: Final answer
   x = 7,668.40