Finding the Fourth Proportional to 2,139.49, 3,207.27 and 752.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139.49 : 3,207.27 = 752.07 : x
2. Step 2: Convert to fraction form
   2,139.49/3,207.27 = 752.07/x
3. Step 3: Cross multiply
   2,139.49x = 3,207.27 × 752.07
4. Step 4: Simplify right side
   2,139.49x = 2,412,091.55
5. Step 5: Solve for x
   x = 2,412,091.55/2,139.49
6. Step 6: Final answer
   x = 1,127.41