Finding the Fourth Proportional to 10,945.91, 16,408.31 and 3,545.35

Step by Step Solution

1. Step 1: Write the proportion equation
   10,945.91 : 16,408.31 = 3,545.35 : x
2. Step 2: Convert to fraction form
   10,945.91/16,408.31 = 3,545.35/x
3. Step 3: Cross multiply
   10,945.91x = 16,408.31 × 3,545.35
4. Step 4: Simplify right side
   10,945.91x = 58,173,143.11
5. Step 5: Solve for x
   x = 58,173,143.11/10,945.91
6. Step 6: Final answer
   x = 5,314.60