Finding the Fourth Proportional to 1,707.37, 2,559.31 and 666.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,707.37 : 2,559.31 = 666.71 : x
2. Step 2: Convert to fraction form
   1,707.37/2,559.31 = 666.71/x
3. Step 3: Cross multiply
   1,707.37x = 2,559.31 × 666.71
4. Step 4: Simplify right side
   1,707.37x = 1,706,317.57
5. Step 5: Solve for x
   x = 1,706,317.57/1,707.37
6. Step 6: Final answer
   x = 999.38