Finding the Fourth Proportional to 11,185.31, 16,783.43 and 7,919.39

Step by Step Solution

1. Step 1: Write the proportion equation
   11,185.31 : 16,783.43 = 7,919.39 : x
2. Step 2: Convert to fraction form
   11,185.31/16,783.43 = 7,919.39/x
3. Step 3: Cross multiply
   11,185.31x = 16,783.43 × 7,919.39
4. Step 4: Simplify right side
   11,185.31x = 132,914,404.19
5. Step 5: Solve for x
   x = 132,914,404.19/11,185.31
6. Step 6: Final answer
   x = 11,882.95