Finding the Fourth Proportional to 1,707.35, 2,558.31 and 1,243

Step by Step Solution

1. Step 1: Write the proportion equation
   1,707.35 : 2,558.31 = 1,243 : x
2. Step 2: Convert to fraction form
   1,707.35/2,558.31 = 1,243/x
3. Step 3: Cross multiply
   1,707.35x = 2,558.31 × 1,243
4. Step 4: Simplify right side
   1,707.35x = 3,179,979.33
5. Step 5: Solve for x
   x = 3,179,979.33/1,707.35
6. Step 6: Final answer
   x = 1,862.52