Finding the Fourth Proportional to 1,574.82, 2,173.14 and 911.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,574.82 : 2,173.14 = 911.56 : x
2. Step 2: Convert to fraction form
   1,574.82/2,173.14 = 911.56/x
3. Step 3: Cross multiply
   1,574.82x = 2,173.14 × 911.56
4. Step 4: Simplify right side
   1,574.82x = 1,980,947.50
5. Step 5: Solve for x
   x = 1,980,947.50/1,574.82
6. Step 6: Final answer
   x = 1,257.89