Finding the Fourth Proportional to 1,379.44, 1,903.53 and 1,085.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,379.44 : 1,903.53 = 1,085.41 : x
2. Step 2: Convert to fraction form
   1,379.44/1,903.53 = 1,085.41/x
3. Step 3: Cross multiply
   1,379.44x = 1,903.53 × 1,085.41
4. Step 4: Simplify right side
   1,379.44x = 2,066,110.50
5. Step 5: Solve for x
   x = 2,066,110.50/1,379.44
6. Step 6: Final answer
   x = 1,497.79