Finding the Fourth Proportional to 2,659.98, 3,636.60 and 2,557.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,659.98 : 3,636.60 = 2,557.92 : x
2. Step 2: Convert to fraction form
   2,659.98/3,636.60 = 2,557.92/x
3. Step 3: Cross multiply
   2,659.98x = 3,636.60 × 2,557.92
4. Step 4: Simplify right side
   2,659.98x = 9,302,131.87
5. Step 5: Solve for x
   x = 9,302,131.87/2,659.98
6. Step 6: Final answer
   x = 3,497.07