Finding the Fourth Proportional to 10,890.36, 16,327.58 and 3,490.61

Step by Step Solution

1. Step 1: Write the proportion equation
   10,890.36 : 16,327.58 = 3,490.61 : x
2. Step 2: Convert to fraction form
   10,890.36/16,327.58 = 3,490.61/x
3. Step 3: Cross multiply
   10,890.36x = 16,327.58 × 3,490.61
4. Step 4: Simplify right side
   10,890.36x = 56,993,114.93
5. Step 5: Solve for x
   x = 56,993,114.93/10,890.36
6. Step 6: Final answer
   x = 5,233.35