Finding the Fourth Proportional to 10,890.32, 16,337.60 and 3,494.21

Step by Step Solution

1. Step 1: Write the proportion equation
   10,890.32 : 16,337.60 = 3,494.21 : x
2. Step 2: Convert to fraction form
   10,890.32/16,337.60 = 3,494.21/x
3. Step 3: Cross multiply
   10,890.32x = 16,337.60 × 3,494.21
4. Step 4: Simplify right side
   10,890.32x = 57,086,962.98
5. Step 5: Solve for x
   x = 57,086,962.98/10,890.32
6. Step 6: Final answer
   x = 5,241.99