Finding the Fourth Proportional to 2,139.09, 3,206.72 and 1,152.44

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139.09 : 3,206.72 = 1,152.44 : x
2. Step 2: Convert to fraction form
   2,139.09/3,206.72 = 1,152.44/x
3. Step 3: Cross multiply
   2,139.09x = 3,206.72 × 1,152.44
4. Step 4: Simplify right side
   2,139.09x = 3,695,530.60
5. Step 5: Solve for x
   x = 3,695,530.60/2,139.09
6. Step 6: Final answer
   x = 1,727.62