Finding the Fourth Proportional to 11,381.76, 17,074.56 and 3,590.40

Step by Step Solution

1. Step 1: Write the proportion equation
   11,381.76 : 17,074.56 = 3,590.40 : x
2. Step 2: Convert to fraction form
   11,381.76/17,074.56 = 3,590.40/x
3. Step 3: Cross multiply
   11,381.76x = 17,074.56 × 3,590.40
4. Step 4: Simplify right side
   11,381.76x = 61,304,500.22
5. Step 5: Solve for x
   x = 61,304,500.22/11,381.76
6. Step 6: Final answer
   x = 5,386.21