Finding the Fourth Proportional to 9,099.46, 12,556.96 and 5,120.79

Step by Step Solution

1. Step 1: Write the proportion equation
   9,099.46 : 12,556.96 = 5,120.79 : x
2. Step 2: Convert to fraction form
   9,099.46/12,556.96 = 5,120.79/x
3. Step 3: Cross multiply
   9,099.46x = 12,556.96 × 5,120.79
4. Step 4: Simplify right side
   9,099.46x = 64,301,555.20
5. Step 5: Solve for x
   x = 64,301,555.20/9,099.46
6. Step 6: Final answer
   x = 7,066.52