Finding the Fourth Proportional to 9,099.08, 12,556.56 and 5,120.06

Step by Step Solution

1. Step 1: Write the proportion equation
   9,099.08 : 12,556.56 = 5,120.06 : x
2. Step 2: Convert to fraction form
   9,099.08/12,556.56 = 5,120.06/x
3. Step 3: Cross multiply
   9,099.08x = 12,556.56 × 5,120.06
4. Step 4: Simplify right side
   9,099.08x = 64,290,340.59
5. Step 5: Solve for x
   x = 64,290,340.59/9,099.08
6. Step 6: Final answer
   x = 7,065.59