Finding the Fourth Proportional to 2,160.81, 3,239.73 and 700.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,160.81 : 3,239.73 = 700.38 : x
2. Step 2: Convert to fraction form
   2,160.81/3,239.73 = 700.38/x
3. Step 3: Cross multiply
   2,160.81x = 3,239.73 × 700.38
4. Step 4: Simplify right side
   2,160.81x = 2,269,042.10
5. Step 5: Solve for x
   x = 2,269,042.10/2,160.81
6. Step 6: Final answer
   x = 1,050.09