Finding the Fourth Proportional to 9,396.17, 12,966.80 and 5,417.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,396.17 : 12,966.80 = 5,417.28 : x
2. Step 2: Convert to fraction form
   9,396.17/12,966.80 = 5,417.28/x
3. Step 3: Cross multiply
   9,396.17x = 12,966.80 × 5,417.28
4. Step 4: Simplify right side
   9,396.17x = 70,244,789.69
5. Step 5: Solve for x
   x = 70,244,789.69/9,396.17
6. Step 6: Final answer
   x = 7,475.90