Finding the Fourth Proportional to 1,800.06, 2,689.58 and 1,329.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,800.06 : 2,689.58 = 1,329.54 : x
2. Step 2: Convert to fraction form
   1,800.06/2,689.58 = 1,329.54/x
3. Step 3: Cross multiply
   1,800.06x = 2,689.58 × 1,329.54
4. Step 4: Simplify right side
   1,800.06x = 3,575,897.55
5. Step 5: Solve for x
   x = 3,575,897.55/1,800.06
6. Step 6: Final answer
   x = 1,986.54