Finding the Fourth Proportional to 1,173.17, 1,760.00 and 828.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,173.17 : 1,760.00 = 828.72 : x
2. Step 2: Convert to fraction form
   1,173.17/1,760.00 = 828.72/x
3. Step 3: Cross multiply
   1,173.17x = 1,760.00 × 828.72
4. Step 4: Simplify right side
   1,173.17x = 1,458,543.06
5. Step 5: Solve for x
   x = 1,458,543.06/1,173.17
6. Step 6: Final answer
   x = 1,243.25