Finding the Fourth Proportional to 11,400.81, 17,100.90 and 3,609.42

Step by Step Solution

1. Step 1: Write the proportion equation
   11,400.81 : 17,100.90 = 3,609.42 : x
2. Step 2: Convert to fraction form
   11,400.81/17,100.90 = 3,609.42/x
3. Step 3: Cross multiply
   11,400.81x = 17,100.90 × 3,609.42
4. Step 4: Simplify right side
   11,400.81x = 61,724,330.48
5. Step 5: Solve for x
   x = 61,724,330.48/11,400.81
6. Step 6: Final answer
   x = 5,414.03