Finding the Fourth Proportional to 10,890.78, 16,335.19 and 3,493.23

Step by Step Solution

1. Step 1: Write the proportion equation
   10,890.78 : 16,335.19 = 3,493.23 : x
2. Step 2: Convert to fraction form
   10,890.78/16,335.19 = 3,493.23/x
3. Step 3: Cross multiply
   10,890.78x = 16,335.19 × 3,493.23
4. Step 4: Simplify right side
   10,890.78x = 57,062,575.76
5. Step 5: Solve for x
   x = 57,062,575.76/10,890.78
6. Step 6: Final answer
   x = 5,239.53