Finding the Fourth Proportional to 9,407.92, 12,983.12 and 5,216.16

Step by Step Solution

1. Step 1: Write the proportion equation
   9,407.92 : 12,983.12 = 5,216.16 : x
2. Step 2: Convert to fraction form
   9,407.92/12,983.12 = 5,216.16/x
3. Step 3: Cross multiply
   9,407.92x = 12,983.12 × 5,216.16
4. Step 4: Simplify right side
   9,407.92x = 67,722,031.22
5. Step 5: Solve for x
   x = 67,722,031.22/9,407.92
6. Step 6: Final answer
   x = 7,198.41