Finding the Fourth Proportional to 2,139.32, 2,952.56 and 1,255.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139.32 : 2,952.56 = 1,255.42 : x
2. Step 2: Convert to fraction form
   2,139.32/2,952.56 = 1,255.42/x
3. Step 3: Cross multiply
   2,139.32x = 2,952.56 × 1,255.42
4. Step 4: Simplify right side
   2,139.32x = 3,706,681.84
5. Step 5: Solve for x
   x = 3,706,681.84/2,139.32
6. Step 6: Final answer
   x = 1,732.64