Finding the Fourth Proportional to 10,890.12, 16,334.06 and 3,499.88

Step by Step Solution

1. Step 1: Write the proportion equation
   10,890.12 : 16,334.06 = 3,499.88 : x
2. Step 2: Convert to fraction form
   10,890.12/16,334.06 = 3,499.88/x
3. Step 3: Cross multiply
   10,890.12x = 16,334.06 × 3,499.88
4. Step 4: Simplify right side
   10,890.12x = 57,167,249.91
5. Step 5: Solve for x
   x = 57,167,249.91/10,890.12
6. Step 6: Final answer
   x = 5,249.46