Finding the Fourth Proportional to 2,411.90, 3,617.60 and 1,636.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,411.90 : 3,617.60 = 1,636.88 : x
2. Step 2: Convert to fraction form
   2,411.90/3,617.60 = 1,636.88/x
3. Step 3: Cross multiply
   2,411.90x = 3,617.60 × 1,636.88
4. Step 4: Simplify right side
   2,411.90x = 5,921,573.59
5. Step 5: Solve for x
   x = 5,921,573.59/2,411.90
6. Step 6: Final answer
   x = 2,455.15