Finding the Fourth Proportional to 1,071.33, 1,609.69 and 681.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,071.33 : 1,609.69 = 681.50 : x
2. Step 2: Convert to fraction form
   1,071.33/1,609.69 = 681.50/x
3. Step 3: Cross multiply
   1,071.33x = 1,609.69 × 681.50
4. Step 4: Simplify right side
   1,071.33x = 1,097,002.19
5. Step 5: Solve for x
   x = 1,097,002.19/1,071.33
6. Step 6: Final answer
   x = 1,023.97