Finding the Fourth Proportional to 9,112.72, 12,573.04 and 5,133.60

Step by Step Solution

1. Step 1: Write the proportion equation
   9,112.72 : 12,573.04 = 5,133.60 : x
2. Step 2: Convert to fraction form
   9,112.72/12,573.04 = 5,133.60/x
3. Step 3: Cross multiply
   9,112.72x = 12,573.04 × 5,133.60
4. Step 4: Simplify right side
   9,112.72x = 64,544,958.14
5. Step 5: Solve for x
   x = 64,544,958.14/9,112.72
6. Step 6: Final answer
   x = 7,082.95