Finding the Fourth Proportional to 1,636.49, 2,454.50 and 540.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,636.49 : 2,454.50 = 540.72 : x
2. Step 2: Convert to fraction form
   1,636.49/2,454.50 = 540.72/x
3. Step 3: Cross multiply
   1,636.49x = 2,454.50 × 540.72
4. Step 4: Simplify right side
   1,636.49x = 1,327,198.59
5. Step 5: Solve for x
   x = 1,327,198.59/1,636.49
6. Step 6: Final answer
   x = 811.00