Finding the Fourth Proportional to 1,271.32, 1,907.33 and 723.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,271.32 : 1,907.33 = 723.89 : x
2. Step 2: Convert to fraction form
   1,271.32/1,907.33 = 723.89/x
3. Step 3: Cross multiply
   1,271.32x = 1,907.33 × 723.89
4. Step 4: Simplify right side
   1,271.32x = 1,380,698.26
5. Step 5: Solve for x
   x = 1,380,698.26/1,271.32
6. Step 6: Final answer
   x = 1,086.04