Finding the Fourth Proportional to 2,189.78, 3,281.72 and 1,003.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,189.78 : 3,281.72 = 1,003.02 : x
2. Step 2: Convert to fraction form
   2,189.78/3,281.72 = 1,003.02/x
3. Step 3: Cross multiply
   2,189.78x = 3,281.72 × 1,003.02
4. Step 4: Simplify right side
   2,189.78x = 3,291,625.78
5. Step 5: Solve for x
   x = 3,291,625.78/2,189.78
6. Step 6: Final answer
   x = 1,503.18