Finding the Fourth Proportional to 11,411.34, 17,118.38 and 4,389.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,411.34 : 17,118.38 = 4,389.72 : x
2. Step 2: Convert to fraction form
   11,411.34/17,118.38 = 4,389.72/x
3. Step 3: Cross multiply
   11,411.34x = 17,118.38 × 4,389.72
4. Step 4: Simplify right side
   11,411.34x = 75,144,895.05
5. Step 5: Solve for x
   x = 75,144,895.05/11,411.34
6. Step 6: Final answer
   x = 6,585.11