Finding the Fourth Proportional to 1,989.16, 2,982.71 and 892.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,989.16 : 2,982.71 = 892.58 : x
2. Step 2: Convert to fraction form
   1,989.16/2,982.71 = 892.58/x
3. Step 3: Cross multiply
   1,989.16x = 2,982.71 × 892.58
4. Step 4: Simplify right side
   1,989.16x = 2,662,314.33
5. Step 5: Solve for x
   x = 2,662,314.33/1,989.16
6. Step 6: Final answer
   x = 1,338.41