Finding the Fourth Proportional to 11,411.87, 17,120.52 and 3,620.68

Step by Step Solution

1. Step 1: Write the proportion equation
   11,411.87 : 17,120.52 = 3,620.68 : x
2. Step 2: Convert to fraction form
   11,411.87/17,120.52 = 3,620.68/x
3. Step 3: Cross multiply
   11,411.87x = 17,120.52 × 3,620.68
4. Step 4: Simplify right side
   11,411.87x = 61,987,881.55
5. Step 5: Solve for x
   x = 61,987,881.55/11,411.87
6. Step 6: Final answer
   x = 5,431.88