Finding the Fourth Proportional to 1,773.69, 2,659.86 and 540.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,773.69 : 2,659.86 = 540.72 : x
2. Step 2: Convert to fraction form
   1,773.69/2,659.86 = 540.72/x
3. Step 3: Cross multiply
   1,773.69x = 2,659.86 × 540.72
4. Step 4: Simplify right side
   1,773.69x = 1,438,239.50
5. Step 5: Solve for x
   x = 1,438,239.50/1,773.69
6. Step 6: Final answer
   x = 810.87