Finding the Fourth Proportional to 1,659.01, 2,488.81 and 684.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,659.01 : 2,488.81 = 684.58 : x
2. Step 2: Convert to fraction form
   1,659.01/2,488.81 = 684.58/x
3. Step 3: Cross multiply
   1,659.01x = 2,488.81 × 684.58
4. Step 4: Simplify right side
   1,659.01x = 1,703,789.55
5. Step 5: Solve for x
   x = 1,703,789.55/1,659.01
6. Step 6: Final answer
   x = 1,026.99