Finding the Fourth Proportional to 1,635.86, 2,256.18 and 1,321.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,635.86 : 2,256.18 = 1,321.04 : x
2. Step 2: Convert to fraction form
   1,635.86/2,256.18 = 1,321.04/x
3. Step 3: Cross multiply
   1,635.86x = 2,256.18 × 1,321.04
4. Step 4: Simplify right side
   1,635.86x = 2,980,504.03
5. Step 5: Solve for x
   x = 2,980,504.03/1,635.86
6. Step 6: Final answer
   x = 1,821.98