Finding the Fourth Proportional to 7,139.50, 10,709.39 and 1,945.51

Step by Step Solution

1. Step 1: Write the proportion equation
   7,139.50 : 10,709.39 = 1,945.51 : x
2. Step 2: Convert to fraction form
   7,139.50/10,709.39 = 1,945.51/x
3. Step 3: Cross multiply
   7,139.50x = 10,709.39 × 1,945.51
4. Step 4: Simplify right side
   7,139.50x = 20,835,225.34
5. Step 5: Solve for x
   x = 20,835,225.34/7,139.50
6. Step 6: Final answer
   x = 2,918.30