Finding the Fourth Proportional to 1,406.56, 2,107.10 and 711.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,406.56 : 2,107.10 = 711.18 : x
2. Step 2: Convert to fraction form
   1,406.56/2,107.10 = 711.18/x
3. Step 3: Cross multiply
   1,406.56x = 2,107.10 × 711.18
4. Step 4: Simplify right side
   1,406.56x = 1,498,527.38
5. Step 5: Solve for x
   x = 1,498,527.38/1,406.56
6. Step 6: Final answer
   x = 1,065.38