Finding the Fourth Proportional to 11,420.56, 17,132.69 and 3,521.23

Step by Step Solution

1. Step 1: Write the proportion equation
   11,420.56 : 17,132.69 = 3,521.23 : x
2. Step 2: Convert to fraction form
   11,420.56/17,132.69 = 3,521.23/x
3. Step 3: Cross multiply
   11,420.56x = 17,132.69 × 3,521.23
4. Step 4: Simplify right side
   11,420.56x = 60,328,081.57
5. Step 5: Solve for x
   x = 60,328,081.57/11,420.56
6. Step 6: Final answer
   x = 5,282.41