Finding the Fourth Proportional to 1,659.83, 2,488.01 and 672.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,659.83 : 2,488.01 = 672.30 : x
2. Step 2: Convert to fraction form
   1,659.83/2,488.01 = 672.30/x
3. Step 3: Cross multiply
   1,659.83x = 2,488.01 × 672.30
4. Step 4: Simplify right side
   1,659.83x = 1,672,685.76
5. Step 5: Solve for x
   x = 1,672,685.76/1,659.83
6. Step 6: Final answer
   x = 1,007.75