Finding the Fourth Proportional to 1,285.17, 1,926.38 and 873.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,285.17 : 1,926.38 = 873.28 : x
2. Step 2: Convert to fraction form
   1,285.17/1,926.38 = 873.28/x
3. Step 3: Cross multiply
   1,285.17x = 1,926.38 × 873.28
4. Step 4: Simplify right side
   1,285.17x = 1,682,273.72
5. Step 5: Solve for x
   x = 1,682,273.72/1,285.17
6. Step 6: Final answer
   x = 1,308.99