Finding the Fourth Proportional to 10,931.42, 16,405.10 and 4,359.49

Step by Step Solution

1. Step 1: Write the proportion equation
   10,931.42 : 16,405.10 = 4,359.49 : x
2. Step 2: Convert to fraction form
   10,931.42/16,405.10 = 4,359.49/x
3. Step 3: Cross multiply
   10,931.42x = 16,405.10 × 4,359.49
4. Step 4: Simplify right side
   10,931.42x = 71,517,822.94
5. Step 5: Solve for x
   x = 71,517,822.94/10,931.42
6. Step 6: Final answer
   x = 6,542.41