Finding the Fourth Proportional to 10,890.45, 16,332.84 and 3,491.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,890.45 : 16,332.84 = 3,491.10 : x
2. Step 2: Convert to fraction form
   10,890.45/16,332.84 = 3,491.10/x
3. Step 3: Cross multiply
   10,890.45x = 16,332.84 × 3,491.10
4. Step 4: Simplify right side
   10,890.45x = 57,019,577.72
5. Step 5: Solve for x
   x = 57,019,577.72/10,890.45
6. Step 6: Final answer
   x = 5,235.74