Finding the Fourth Proportional to 9,356.43, 12,911.53 and 5,164.59

Step by Step Solution

1. Step 1: Write the proportion equation
   9,356.43 : 12,911.53 = 5,164.59 : x
2. Step 2: Convert to fraction form
   9,356.43/12,911.53 = 5,164.59/x
3. Step 3: Cross multiply
   9,356.43x = 12,911.53 × 5,164.59
4. Step 4: Simplify right side
   9,356.43x = 66,682,758.72
5. Step 5: Solve for x
   x = 66,682,758.72/9,356.43
6. Step 6: Final answer
   x = 7,126.94