Finding the Fourth Proportional to 1,003.58, 1,504.67 and 540.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.58 : 1,504.67 = 540.89 : x
2. Step 2: Convert to fraction form
   1,003.58/1,504.67 = 540.89/x
3. Step 3: Cross multiply
   1,003.58x = 1,504.67 × 540.89
4. Step 4: Simplify right side
   1,003.58x = 813,850.73
5. Step 5: Solve for x
   x = 813,850.73/1,003.58
6. Step 6: Final answer
   x = 810.95