Finding the Fourth Proportional to 10,889.12, 16,332.56 and 3,498.88

Step by Step Solution

1. Step 1: Write the proportion equation
   10,889.12 : 16,332.56 = 3,498.88 : x
2. Step 2: Convert to fraction form
   10,889.12/16,332.56 = 3,498.88/x
3. Step 3: Cross multiply
   10,889.12x = 16,332.56 × 3,498.88
4. Step 4: Simplify right side
   10,889.12x = 57,145,667.53
5. Step 5: Solve for x
   x = 57,145,667.53/10,889.12
6. Step 6: Final answer
   x = 5,247.96