Finding the Fourth Proportional to 13,311.84, 19,966.43 and 5,414.82

Step by Step Solution

1. Step 1: Write the proportion equation
   13,311.84 : 19,966.43 = 5,414.82 : x
2. Step 2: Convert to fraction form
   13,311.84/19,966.43 = 5,414.82/x
3. Step 3: Cross multiply
   13,311.84x = 19,966.43 × 5,414.82
4. Step 4: Simplify right side
   13,311.84x = 108,114,731.62
5. Step 5: Solve for x
   x = 108,114,731.62/13,311.84
6. Step 6: Final answer
   x = 8,121.69