Finding the Fourth Proportional to 9,099.18, 12,556.89 and 5,120.34

Step by Step Solution

1. Step 1: Write the proportion equation
   9,099.18 : 12,556.89 = 5,120.34 : x
2. Step 2: Convert to fraction form
   9,099.18/12,556.89 = 5,120.34/x
3. Step 3: Cross multiply
   9,099.18x = 12,556.89 × 5,120.34
4. Step 4: Simplify right side
   9,099.18x = 64,295,546.14
5. Step 5: Solve for x
   x = 64,295,546.14/9,099.18
6. Step 6: Final answer
   x = 7,066.08