Finding the Fourth Proportional to 12,913.77, 19,367.46 and 3,553.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,913.77 : 19,367.46 = 3,553.34 : x
2. Step 2: Convert to fraction form
   12,913.77/19,367.46 = 3,553.34/x
3. Step 3: Cross multiply
   12,913.77x = 19,367.46 × 3,553.34
4. Step 4: Simplify right side
   12,913.77x = 68,819,073.48
5. Step 5: Solve for x
   x = 68,819,073.48/12,913.77
6. Step 6: Final answer
   x = 5,329.12