Finding the Fourth Proportional to 9,356.09, 12,911.33 and 5,164.25

Step by Step Solution

1. Step 1: Write the proportion equation
   9,356.09 : 12,911.33 = 5,164.25 : x
2. Step 2: Convert to fraction form
   9,356.09/12,911.33 = 5,164.25/x
3. Step 3: Cross multiply
   9,356.09x = 12,911.33 × 5,164.25
4. Step 4: Simplify right side
   9,356.09x = 66,677,310.13
5. Step 5: Solve for x
   x = 66,677,310.13/9,356.09
6. Step 6: Final answer
   x = 7,126.62