Finding the Fourth Proportional to 1,379.43, 1,903.86 and 1,086.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,379.43 : 1,903.86 = 1,086.03 : x
2. Step 2: Convert to fraction form
   1,379.43/1,903.86 = 1,086.03/x
3. Step 3: Cross multiply
   1,379.43x = 1,903.86 × 1,086.03
4. Step 4: Simplify right side
   1,379.43x = 2,067,649.08
5. Step 5: Solve for x
   x = 2,067,649.08/1,379.43
6. Step 6: Final answer
   x = 1,498.92