Finding the Fourth Proportional to 13,404.98, 20,105.78 and 3,545.04

Step by Step Solution

1. Step 1: Write the proportion equation
   13,404.98 : 20,105.78 = 3,545.04 : x
2. Step 2: Convert to fraction form
   13,404.98/20,105.78 = 3,545.04/x
3. Step 3: Cross multiply
   13,404.98x = 20,105.78 × 3,545.04
4. Step 4: Simplify right side
   13,404.98x = 71,275,803.19
5. Step 5: Solve for x
   x = 71,275,803.19/13,404.98
6. Step 6: Final answer
   x = 5,317.11