Finding the Fourth Proportional to 7,136.89, 10,705.92 and 1,871.89

Step by Step Solution

1. Step 1: Write the proportion equation
   7,136.89 : 10,705.92 = 1,871.89 : x
2. Step 2: Convert to fraction form
   7,136.89/10,705.92 = 1,871.89/x
3. Step 3: Cross multiply
   7,136.89x = 10,705.92 × 1,871.89
4. Step 4: Simplify right side
   7,136.89x = 20,040,304.59
5. Step 5: Solve for x
   x = 20,040,304.59/7,136.89
6. Step 6: Final answer
   x = 2,807.99