Finding the Fourth Proportional to 11,895.46, 16,419.12 and 7,180.05

Step by Step Solution

1. Step 1: Write the proportion equation
   11,895.46 : 16,419.12 = 7,180.05 : x
2. Step 2: Convert to fraction form
   11,895.46/16,419.12 = 7,180.05/x
3. Step 3: Cross multiply
   11,895.46x = 16,419.12 × 7,180.05
4. Step 4: Simplify right side
   11,895.46x = 117,890,102.56
5. Step 5: Solve for x
   x = 117,890,102.56/11,895.46
6. Step 6: Final answer
   x = 9,910.51