Finding the Fourth Proportional to 11,354.91, 17,021.42 and 3,561.90

Step by Step Solution

1. Step 1: Write the proportion equation
   11,354.91 : 17,021.42 = 3,561.90 : x
2. Step 2: Convert to fraction form
   11,354.91/17,021.42 = 3,561.90/x
3. Step 3: Cross multiply
   11,354.91x = 17,021.42 × 3,561.90
4. Step 4: Simplify right side
   11,354.91x = 60,628,595.90
5. Step 5: Solve for x
   x = 60,628,595.90/11,354.91
6. Step 6: Final answer
   x = 5,339.42