Finding the Fourth Proportional to 9,396.78, 12,967.74 and 5,417.22

Step by Step Solution

1. Step 1: Write the proportion equation
   9,396.78 : 12,967.74 = 5,417.22 : x
2. Step 2: Convert to fraction form
   9,396.78/12,967.74 = 5,417.22/x
3. Step 3: Cross multiply
   9,396.78x = 12,967.74 × 5,417.22
4. Step 4: Simplify right side
   9,396.78x = 70,249,100.48
5. Step 5: Solve for x
   x = 70,249,100.48/9,396.78
6. Step 6: Final answer
   x = 7,475.87