Finding the Fourth Proportional to 9,356.27, 12,911.04 and 5,164.61

Step by Step Solution

1. Step 1: Write the proportion equation
   9,356.27 : 12,911.04 = 5,164.61 : x
2. Step 2: Convert to fraction form
   9,356.27/12,911.04 = 5,164.61/x
3. Step 3: Cross multiply
   9,356.27x = 12,911.04 × 5,164.61
4. Step 4: Simplify right side
   9,356.27x = 66,680,421.74
5. Step 5: Solve for x
   x = 66,680,421.74/9,356.27
6. Step 6: Final answer
   x = 7,126.82