Finding the Fourth Proportional to 11,308.12, 16,956.70 and 3,909.98

Step by Step Solution

1. Step 1: Write the proportion equation
   11,308.12 : 16,956.70 = 3,909.98 : x
2. Step 2: Convert to fraction form
   11,308.12/16,956.70 = 3,909.98/x
3. Step 3: Cross multiply
   11,308.12x = 16,956.70 × 3,909.98
4. Step 4: Simplify right side
   11,308.12x = 66,300,357.87
5. Step 5: Solve for x
   x = 66,300,357.87/11,308.12
6. Step 6: Final answer
   x = 5,863.08