Finding the Fourth Proportional to 9,387.67, 12,956.57 and 5,411.09

Step by Step Solution

1. Step 1: Write the proportion equation
   9,387.67 : 12,956.57 = 5,411.09 : x
2. Step 2: Convert to fraction form
   9,387.67/12,956.57 = 5,411.09/x
3. Step 3: Cross multiply
   9,387.67x = 12,956.57 × 5,411.09
4. Step 4: Simplify right side
   9,387.67x = 70,109,167.70
5. Step 5: Solve for x
   x = 70,109,167.70/9,387.67
6. Step 6: Final answer
   x = 7,468.22