Finding the Fourth Proportional to 9,187.35, 12,679.49 and 5,411.71

Step by Step Solution

1. Step 1: Write the proportion equation
   9,187.35 : 12,679.49 = 5,411.71 : x
2. Step 2: Convert to fraction form
   9,187.35/12,679.49 = 5,411.71/x
3. Step 3: Cross multiply
   9,187.35x = 12,679.49 × 5,411.71
4. Step 4: Simplify right side
   9,187.35x = 68,617,708.94
5. Step 5: Solve for x
   x = 68,617,708.94/9,187.35
6. Step 6: Final answer
   x = 7,468.71