Finding the Fourth Proportional to 1,644.18, 2,268.84 and 898.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,644.18 : 2,268.84 = 898.10 : x
2. Step 2: Convert to fraction form
   1,644.18/2,268.84 = 898.10/x
3. Step 3: Cross multiply
   1,644.18x = 2,268.84 × 898.10
4. Step 4: Simplify right side
   1,644.18x = 2,037,633.86
5. Step 5: Solve for x
   x = 2,037,633.86/1,644.18
6. Step 6: Final answer
   x = 1,239.30