Finding the Fourth Proportional to 10,689.91, 16,031.18 and 4,118.38

Step by Step Solution

1. Step 1: Write the proportion equation
   10,689.91 : 16,031.18 = 4,118.38 : x
2. Step 2: Convert to fraction form
   10,689.91/16,031.18 = 4,118.38/x
3. Step 3: Cross multiply
   10,689.91x = 16,031.18 × 4,118.38
4. Step 4: Simplify right side
   10,689.91x = 66,022,461.31
5. Step 5: Solve for x
   x = 66,022,461.31/10,689.91
6. Step 6: Final answer
   x = 6,176.15