Finding the Fourth Proportional to 1,989.69, 2,985.38 and 1,065

Step by Step Solution

1. Step 1: Write the proportion equation
   1,989.69 : 2,985.38 = 1,065 : x
2. Step 2: Convert to fraction form
   1,989.69/2,985.38 = 1,065/x
3. Step 3: Cross multiply
   1,989.69x = 2,985.38 × 1,065
4. Step 4: Simplify right side
   1,989.69x = 3,179,424.38
5. Step 5: Solve for x
   x = 3,179,424.38/1,989.69
6. Step 6: Final answer
   x = 1,597.95