Finding the Fourth Proportional to 1,617.10, 2,231.52 and 918.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,617.10 : 2,231.52 = 918.46 : x
2. Step 2: Convert to fraction form
   1,617.10/2,231.52 = 918.46/x
3. Step 3: Cross multiply
   1,617.10x = 2,231.52 × 918.46
4. Step 4: Simplify right side
   1,617.10x = 2,049,561.86
5. Step 5: Solve for x
   x = 2,049,561.86/1,617.10
6. Step 6: Final answer
   x = 1,267.43