Finding the Fourth Proportional to 1,139.40, 1,710.32 and 1,003.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139.40 : 1,710.32 = 1,003.32 : x
2. Step 2: Convert to fraction form
   1,139.40/1,710.32 = 1,003.32/x
3. Step 3: Cross multiply
   1,139.40x = 1,710.32 × 1,003.32
4. Step 4: Simplify right side
   1,139.40x = 1,715,993.25
5. Step 5: Solve for x
   x = 1,715,993.25/1,139.40
6. Step 6: Final answer
   x = 1,506.05