Finding the Fourth Proportional to 1,581.24, 2,182.04 and 917.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,581.24 : 2,182.04 = 917.99 : x
2. Step 2: Convert to fraction form
   1,581.24/2,182.04 = 917.99/x
3. Step 3: Cross multiply
   1,581.24x = 2,182.04 × 917.99
4. Step 4: Simplify right side
   1,581.24x = 2,003,087.02
5. Step 5: Solve for x
   x = 2,003,087.02/1,581.24
6. Step 6: Final answer
   x = 1,266.78