Finding the Fourth Proportional to 1,257.29, 1,892.54 and 1,069.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,257.29 : 1,892.54 = 1,069.37 : x
2. Step 2: Convert to fraction form
   1,257.29/1,892.54 = 1,069.37/x
3. Step 3: Cross multiply
   1,257.29x = 1,892.54 × 1,069.37
4. Step 4: Simplify right side
   1,257.29x = 2,023,810.69
5. Step 5: Solve for x
   x = 2,023,810.69/1,257.29
6. Step 6: Final answer
   x = 1,609.67