Finding the Fourth Proportional to 9,012.87, 12,439.17 and 5,474.79

Step by Step Solution

1. Step 1: Write the proportion equation
   9,012.87 : 12,439.17 = 5,474.79 : x
2. Step 2: Convert to fraction form
   9,012.87/12,439.17 = 5,474.79/x
3. Step 3: Cross multiply
   9,012.87x = 12,439.17 × 5,474.79
4. Step 4: Simplify right side
   9,012.87x = 68,101,843.52
5. Step 5: Solve for x
   x = 68,101,843.52/9,012.87
6. Step 6: Final answer
   x = 7,556.07