Finding the Fourth Proportional to 7,139.91, 10,709.91 and 1,945.83

Step by Step Solution

1. Step 1: Write the proportion equation
   7,139.91 : 10,709.91 = 1,945.83 : x
2. Step 2: Convert to fraction form
   7,139.91/10,709.91 = 1,945.83/x
3. Step 3: Cross multiply
   7,139.91x = 10,709.91 × 1,945.83
4. Step 4: Simplify right side
   7,139.91x = 20,839,664.18
5. Step 5: Solve for x
   x = 20,839,664.18/7,139.91
6. Step 6: Final answer
   x = 2,918.76