Finding the Fourth Proportional to 2,072.69, 2,860.72 and 1,189.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,072.69 : 2,860.72 = 1,189.08 : x
2. Step 2: Convert to fraction form
   2,072.69/2,860.72 = 1,189.08/x
3. Step 3: Cross multiply
   2,072.69x = 2,860.72 × 1,189.08
4. Step 4: Simplify right side
   2,072.69x = 3,401,621.96
5. Step 5: Solve for x
   x = 3,401,621.96/2,072.69
6. Step 6: Final answer
   x = 1,641.16