Finding the Fourth Proportional to 1,616.20, 2,230.25 and 1,018.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,616.20 : 2,230.25 = 1,018.82 : x
2. Step 2: Convert to fraction form
   1,616.20/2,230.25 = 1,018.82/x
3. Step 3: Cross multiply
   1,616.20x = 2,230.25 × 1,018.82
4. Step 4: Simplify right side
   1,616.20x = 2,272,223.79
5. Step 5: Solve for x
   x = 2,272,223.79/1,616.20
6. Step 6: Final answer
   x = 1,405.91