Finding the Fourth Proportional to 1,800.89, 2,485.17 and 1,004.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,800.89 : 2,485.17 = 1,004.19 : x
2. Step 2: Convert to fraction form
   1,800.89/2,485.17 = 1,004.19/x
3. Step 3: Cross multiply
   1,800.89x = 2,485.17 × 1,004.19
4. Step 4: Simplify right side
   1,800.89x = 2,495,582.86
5. Step 5: Solve for x
   x = 2,495,582.86/1,800.89
6. Step 6: Final answer
   x = 1,385.75