Finding the Fourth Proportional to 1,618.52, 2,428.72 and 1,098.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,618.52 : 2,428.72 = 1,098.83 : x
2. Step 2: Convert to fraction form
   1,618.52/2,428.72 = 1,098.83/x
3. Step 3: Cross multiply
   1,618.52x = 2,428.72 × 1,098.83
4. Step 4: Simplify right side
   1,618.52x = 2,668,753.72
5. Step 5: Solve for x
   x = 2,668,753.72/1,618.52
6. Step 6: Final answer
   x = 1,648.89