Finding the Fourth Proportional to 1,574.10, 2,172.42 and 910.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,574.10 : 2,172.42 = 910.92 : x
2. Step 2: Convert to fraction form
   1,574.10/2,172.42 = 910.92/x
3. Step 3: Cross multiply
   1,574.10x = 2,172.42 × 910.92
4. Step 4: Simplify right side
   1,574.10x = 1,978,900.83
5. Step 5: Solve for x
   x = 1,978,900.83/1,574.10
6. Step 6: Final answer
   x = 1,257.16