Finding the Fourth Proportional to 1,003.79, 1,504.37 and 541.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.79 : 1,504.37 = 541.69 : x
2. Step 2: Convert to fraction form
   1,003.79/1,504.37 = 541.69/x
3. Step 3: Cross multiply
   1,003.79x = 1,504.37 × 541.69
4. Step 4: Simplify right side
   1,003.79x = 814,899.78
5. Step 5: Solve for x
   x = 814,899.78/1,003.79
6. Step 6: Final answer
   x = 811.82