Finding the Fourth Proportional to 1,668.89, 2,301.81 and 1,005.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,668.89 : 2,301.81 = 1,005.50 : x
2. Step 2: Convert to fraction form
   1,668.89/2,301.81 = 1,005.50/x
3. Step 3: Cross multiply
   1,668.89x = 2,301.81 × 1,005.50
4. Step 4: Simplify right side
   1,668.89x = 2,314,469.96
5. Step 5: Solve for x
   x = 2,314,469.96/1,668.89
6. Step 6: Final answer
   x = 1,386.83