Finding the Fourth Proportional to 9,391.78, 12,960.84 and 5,412.22

Step by Step Solution

1. Step 1: Write the proportion equation
   9,391.78 : 12,960.84 = 5,412.22 : x
2. Step 2: Convert to fraction form
   9,391.78/12,960.84 = 5,412.22/x
3. Step 3: Cross multiply
   9,391.78x = 12,960.84 × 5,412.22
4. Step 4: Simplify right side
   9,391.78x = 70,146,917.46
5. Step 5: Solve for x
   x = 70,146,917.46/9,391.78
6. Step 6: Final answer
   x = 7,468.97