Finding the Fourth Proportional to 1,039.26, 1,429.98 and 1,003.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,039.26 : 1,429.98 = 1,003.34 : x
2. Step 2: Convert to fraction form
   1,039.26/1,429.98 = 1,003.34/x
3. Step 3: Cross multiply
   1,039.26x = 1,429.98 × 1,003.34
4. Step 4: Simplify right side
   1,039.26x = 1,434,756.13
5. Step 5: Solve for x
   x = 1,434,756.13/1,039.26
6. Step 6: Final answer
   x = 1,380.56