Finding the Fourth Proportional to 9,099.37, 12,557.01 and 5,120.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,099.37 : 12,557.01 = 5,120.56 : x
2. Step 2: Convert to fraction form
   9,099.37/12,557.01 = 5,120.56/x
3. Step 3: Cross multiply
   9,099.37x = 12,557.01 × 5,120.56
4. Step 4: Simplify right side
   9,099.37x = 64,298,923.13
5. Step 5: Solve for x
   x = 64,298,923.13/9,099.37
6. Step 6: Final answer
   x = 7,066.30