Finding the Fourth Proportional to 10,889.60, 16,332.86 and 3,493.09

Step by Step Solution

1. Step 1: Write the proportion equation
   10,889.60 : 16,332.86 = 3,493.09 : x
2. Step 2: Convert to fraction form
   10,889.60/16,332.86 = 3,493.09/x
3. Step 3: Cross multiply
   10,889.60x = 16,332.86 × 3,493.09
4. Step 4: Simplify right side
   10,889.60x = 57,052,152.89
5. Step 5: Solve for x
   x = 57,052,152.89/10,889.60
6. Step 6: Final answer
   x = 5,239.14