Finding the Fourth Proportional to 1,616.45, 2,230.68 and 917.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,616.45 : 2,230.68 = 917.82 : x
2. Step 2: Convert to fraction form
   1,616.45/2,230.68 = 917.82/x
3. Step 3: Cross multiply
   1,616.45x = 2,230.68 × 917.82
4. Step 4: Simplify right side
   1,616.45x = 2,047,362.72
5. Step 5: Solve for x
   x = 2,047,362.72/1,616.45
6. Step 6: Final answer
   x = 1,266.58