Finding the Fourth Proportional to 1,271.37, 1,755.27 and 1,006.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,271.37 : 1,755.27 = 1,006.89 : x
2. Step 2: Convert to fraction form
   1,271.37/1,755.27 = 1,006.89/x
3. Step 3: Cross multiply
   1,271.37x = 1,755.27 × 1,006.89
4. Step 4: Simplify right side
   1,271.37x = 1,767,357.23
5. Step 5: Solve for x
   x = 1,767,357.23/1,271.37
6. Step 6: Final answer
   x = 1,390.12