Finding the Fourth Proportional to 1,659.69, 2,485.94 and 1,613.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,659.69 : 2,485.94 = 1,613.61 : x
2. Step 2: Convert to fraction form
   1,659.69/2,485.94 = 1,613.61/x
3. Step 3: Cross multiply
   1,659.69x = 2,485.94 × 1,613.61
4. Step 4: Simplify right side
   1,659.69x = 4,011,329.58
5. Step 5: Solve for x
   x = 4,011,329.58/1,659.69
6. Step 6: Final answer
   x = 2,416.91