Finding the Fourth Proportional to 1,225.40, 1,837.55 and 403.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,225.40 : 1,837.55 = 403.25 : x
2. Step 2: Convert to fraction form
   1,225.40/1,837.55 = 403.25/x
3. Step 3: Cross multiply
   1,225.40x = 1,837.55 × 403.25
4. Step 4: Simplify right side
   1,225.40x = 740,983.86
5. Step 5: Solve for x
   x = 740,983.86/1,225.40
6. Step 6: Final answer
   x = 604.69