Finding the Fourth Proportional to 1,671.49, 2,508.72 and 892.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,671.49 : 2,508.72 = 892.09 : x
2. Step 2: Convert to fraction form
   1,671.49/2,508.72 = 892.09/x
3. Step 3: Cross multiply
   1,671.49x = 2,508.72 × 892.09
4. Step 4: Simplify right side
   1,671.49x = 2,238,004.02
5. Step 5: Solve for x
   x = 2,238,004.02/1,671.49
6. Step 6: Final answer
   x = 1,338.93