Finding the Fourth Proportional to 7,139.69, 10,709.89 and 1,874.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,139.69 : 10,709.89 = 1,874.72 : x
2. Step 2: Convert to fraction form
   7,139.69/10,709.89 = 1,874.72/x
3. Step 3: Cross multiply
   7,139.69x = 10,709.89 × 1,874.72
4. Step 4: Simplify right side
   7,139.69x = 20,078,067.07
5. Step 5: Solve for x
   x = 20,078,067.07/7,139.69
6. Step 6: Final answer
   x = 2,812.18