Finding the Fourth Proportional to 1,745.28, 2,615.69 and 818.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,745.28 : 2,615.69 = 818.79 : x
2. Step 2: Convert to fraction form
   1,745.28/2,615.69 = 818.79/x
3. Step 3: Cross multiply
   1,745.28x = 2,615.69 × 818.79
4. Step 4: Simplify right side
   1,745.28x = 2,141,700.82
5. Step 5: Solve for x
   x = 2,141,700.82/1,745.28
6. Step 6: Final answer
   x = 1,227.14