Finding the Fourth Proportional to 12,145.82, 16,763.37 and 11,591.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,145.82 : 16,763.37 = 11,591.78 : x
2. Step 2: Convert to fraction form
   12,145.82/16,763.37 = 11,591.78/x
3. Step 3: Cross multiply
   12,145.82x = 16,763.37 × 11,591.78
4. Step 4: Simplify right side
   12,145.82x = 194,317,297.10
5. Step 5: Solve for x
   x = 194,317,297.10/12,145.82
6. Step 6: Final answer
   x = 15,998.70